Mansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529The Importance of Interval Analytical Adjustment in Numerical-Geodetic Calculations.13717322110.21608/bfemu.2021.173221ENA. B.El-OrabyCivil Engineering Department, Faculty of Engineering, Faculty of Engineering, Mansoura University, Mansoura, Egypt.Journal Article19881010<strong>In this research different metho</strong><strong>ds o</strong><strong>f the inte</strong><strong>rv</strong><strong>al </strong><strong>an</strong><strong>alytical adjustment have been introduced. Thei</strong><strong>r qu</strong><strong>ality has been tested by comparing the results obtained fo</strong><strong>r </strong><strong>a t</strong><strong>e</strong><strong>sting example " unidimensional g</strong><strong>eo</strong><strong>detic level </strong><strong>net </strong><strong>". It will </strong><strong>b</strong><strong>e shown that an optimum solution can </strong><strong>be o</strong><strong>btained. </strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_173221_99983305ce010fba3eddd9f225370468.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Traffic Accident Forecasts for Rural Highways.647717323010.21608/bfemu.2021.173230ENAhmed E. T.Abd-El MegeedFaulty of Engineering, Cairo University, Giza, Egypt.Journal Article19881010https://bfemu.journals.ekb.eg/article_173230_04fbe8d1efa7afabcd5b3fcda22e25dc.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220211201What should be done to improve Road and Traffic Conditions in Al-Medina Al-Munawara.789117283310.21608/bfemu.2021.172833ENMohammed El-Shabrawy MohammedAliAssociate Professor., Highway and Trail Tic Engineering faculty of Engineering, El-Mansoura University., Egypt &
Faculty of Technological Studies., Kuwait.Journal Article19881016<strong>Medina, the second Holy City for all Moslems, has recently experienced remarkable growth in all fields of activities. Major changes have resulted in its urban development pattern which influenced the shape of road network and traffic patterns and characteristics. </strong><strong><br /> <strong>Three comprehensive traffic Studies have been performed to evaluate and forecast traffic volumes in Al-Medina Al-Munawara. The first was by Robert Mathew and Johnson Co. in 1971. The second was by the Group of Arab Consultants for Development and Reconstruction in 1978 while the third was a review study by the World Bank in 1984. </strong><br /> <strong>Although these studies have collected a valuable amount of data about road and traffic, each study has some deficiencies where traffic forecasts by all studies are not valid at the present time . Moreover, some links have been added to the road network like Manakhah tunnel and the two way bridge in the first ring road which makes quite urgent, the need for futher study and analysis in both the short and long terms. </strong><br /> <strong>The paper reviews the previous studies, analyses the data, surveys the existing situation of the network and intersections, evaluates the traffic and road conditions and suggests appropriate steps towards developing two appropriate transportation planning strategies, short and long terms, to achieve improved traffic operation in the Holy City of AL MEDINA AL-UNAWARA. </strong><br /> <strong> </strong><br /> <strong> </strong></strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_172833_7f0196f55d841144a8a30b7e27880e56.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220211201Tapered Contact Flocculation; Process and Application.9210117283710.21608/bfemu.2021.172837ENAhmed Fadel AhmedAshryAssistant Professor., Sanitary Engineering
Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881011<strong> </strong><strong>Tapered Contact Focculation (TCF) is a modification of fixed bed contact flocculation. The process employs a bed of graded spherical plastic media to obtain a tapered velocity gradient. </strong><br /> <strong>A general equation for calculating the velocity gradient in any fixed bed medium with spherical grains was developed using the Ergun equation for determining the head Joss across the medium. </strong><br /> <strong>In the TCF process, theoretically, increasing the flocculation rate and temperature increase the G-value, while increasing the media diameter and porosity reduce </strong><strong><br /> <strong>the G-value. </strong><br /> <strong>TCF can be applied to different water treatment plant systems which use flocculation. TCF media can be manufactured of plastic balls stacked in place and wel</strong><em>d</em><strong>ed together. </strong><br /> <strong>Extensive research work is required to determine the best configuration of TCF for application in the water industry and to determine the required TCF time. </strong><br /> <strong> </strong><br /> <strong> </strong></strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_172837_344297145d1a5591db60200be61fdd5d.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220211201Firing Circuits for Phase-Controlled Converters.11217284010.21608/bfemu.2021.172840ENSalah GhazyRamadanFaculty of Engineering., Zagazig University., (Shoubra]Journal Article19881010<strong><span>This paper presents Pour new circuits to fire the single-phase or the three-phase converters. Each of these circuits is synchronized with the supply-voltage using an optic-configuration which utilizes the galvanic separation between the low-power and the high-power parts and bridges over the distortion of the supply voltage due to the commutation. The firing circuits are performed with minimum components which are generally available and used in many applications. These firing circuits are tested using different load types. The obtained results show that the invented circuits are stable and can be practically used to fire the constant frequency sources as well as the variable frequency sources. In addition, their cost is also low compared to the other used firing circuits.</span></strong>https://bfemu.journals.ekb.eg/article_172840_40bcbfa64ef5cef1dd7d54eaf7ec1d6c.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Power Factor Correction of a Permanent-Magnet Synchronous Machine-Drive Using a Transistorized Inverter with Bypass Ways.132317321910.21608/bfemu.2021.173219ENSalah Gh.RamadanFaculty of Engineering [Shoubra]., Zagazig UniversityJournal Article19881011<strong>This paper describes a synchronous machine drive system in which the advantage of a method for power factor correction is taken and practiced. In this method the phase currents are forced, at definite instantaneous values, to bypass the three phases of the machine. Also a new control circuit for the system is theoretically clarified and then practically performed. Here the airgap flux and the induced torque are controlled in accordance to the speed. Thereafter the amplitude of the stator current and its phase angle are controlled to satisfy the load torque and the magnetizing conditions. The machine available is a small permanent magnet synchronous machine and therefore a constant-current small-power rectifier inverter set with a transistorized inverter is used to avoid the complicity of the firing commutating circuits. Using such a type of Invertors and applying this method of power factor correction, the permanent-magnet machine can run with a nearly unity power factor. The obtained results of the steady-state is well as the transient responses are given.</strong>https://bfemu.journals.ekb.eg/article_173219_1809b1f8f5065092720255baae512f6d.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Analysis of a Co-ordinate Governer/Exciter Stabilizer in Multimachine Power Systems based on the Transient Energy Function.243817322010.21608/bfemu.2021.173220ENA. A.AtiaElectrical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>This paper describes, the application of transient energy function and some laws of theoretical mechanics necessary to the problem of analysing Co-ordinated stabilizer in a multimachine power system. The co-ordinated stabilizing inputs for the exciter and governer loops to improve transient stability in the power system are defined. The different energies in the power system are analysed. If the power system is asymptotically stable in the first swing cycle, the rate of change of total transient energy must tend to zero. This constraint is accomplised by the proposed stabilizer. The stabilizer is designed on the base of balancing its forces with the necessary forces to damp swings of generator rotors. </strong><strong><br /> <strong>The effecti</strong><em>v</em><strong>eness of the proposed stabilizer is demonstrated by applying it to a generating station in a 10-generator and 19-bus power system, which represents the reduced Egyptian Unified Network. </strong><br /> <strong> </strong></strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_173220_cfd845c2608af5305ba706e735a6423b.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Nodal Line Finite Difference Method for the Analysis of Rectangular Plates with Abrupt Change in the Thickness.526317322310.21608/bfemu.2021.173223ENYoussefAgagAssociate Professor., Structural Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong> </strong><br /> <strong>A semi-analytical procedure by means of the nodal line finite difference method. Early developed by the Author, is presented for bending analysis of rectangular platen with nbrupi change in thickness in one direction. To overcome the difficulty ariaed from the discountinulty at the line of abrupt change in thickness. A uniform of the difference equation has been developed and incorporuted in the technique presented. Numerical results obtained by the application of the proposed method are compared with those available from author analytical solution. The compared demonstrates a close agreement, which unthcatea the applicability and versatility of the proposed method as a new technique for solving a clarn of plate bending problems. </strong><br /> <strong> </strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_173223_cc0e346db1319a7fbf738a40efce0a97.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Different Materials Consisting the Interference Shrink-Fitted Joints.11617322410.21608/bfemu.2021.173224ENIbrahimElewa AmmarAssistant Professor., Industrial Production and Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.AhmedAbd El-ShafiAssistant Professor., Industrial Production Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>The materials used for the most previous work to investigate the characteristics of shrink-fitted joints are a commercially available mild steel. Shrink-fitted joints are produced using a much wider material range which can include nonferrous materials. The paper at hand is concerned with the effect of changing material type and the use of differeing material combinations on the joint holding load. </strong><strong><br /> <strong>A theoretical approach is adopted to evaluate the holding load and stress induced between the two mating surfaces of the joint. Also, an experimental work is designed to investigate the effects of some parameters on the joint holding load i.e. the surface roughness and the interference value. The different materials used to produce the two members of the joints are, Mild Steel, Brass, Aluminium, and Bronze Phosporic Copper.</strong></strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_173224_f6e56c97a53f037ac6c1147354243c0b.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529The Static Stiffness of the Interference Shrink-Fitted Joints.173217322510.21608/bfemu.2021.173225ENIbrahim Mohamed Ibrahim ElewaAmmarAssistant Professor., Industrial Production Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.RobertThornleyProfessor., Department of Mechanical & Production Engineering., Aston University., UK.Journal Article19881010<strong> </strong><strong>The main objective of the work is to investigate the effect of size, surface roughness and the interference value on the static stiffness of shrink-fitted joints. </strong><br /> <strong>Most of the previous research has been concerned with the joint holding load under static conditions without consideration to many of the applications in which the joints are exposed to dynamic loading. The dynamic performance of a machine tool is greatly affected by the collected response of its joints. In many applications in which shrink fitted joints are used, such as engines and machine tools, their dynamic characteristics can be an important factor in deciding the overall performance of the machine. Hence, studying the joints stiffness characteristics under static and dynamic conditions is of great importance. </strong><strong><br /> <strong> </strong></strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_173225_5682071049ba6db9fa0930f906ede6fc.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529A Theoretical Analysis for the Characteristics of Human Articular Joints.334317322610.21608/bfemu.2021.173226ENM.ZakiDepartment of Industrial Production Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong> </strong><strong>A simple model of two parallel plates with re</strong><em><strong>f</strong></em><strong>erence to human articular joints was suggested and studied in the presence of synovial fluid, Variation of pressure, load capacity, time of approach, concentration of lubricant, minimum film thickness and the effect of cartilage porosity upon lubrication, have been investigated. The mathematical analysis was based on the continuity of pressure and velocities at the interface of the synovial fluid film and the three car ilage layers possessing different porosities. The study brings out many valuable and important results which are in good agreement with earlier experimental observations.</strong><strong><br /> <strong> </strong><br /> <strong> </strong><br /> <strong> </strong><br /> <strong> </strong></strong>https://bfemu.journals.ekb.eg/article_173226_9c18fe0d88304ae7eaaf4f8ea4640304.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Infiltration from Buried Pipes in Unsaturated Soils.445517322710.21608/bfemu.2021.173227ENY. Z.BoutrosFaculty of Engineering., Alexandria University., Egypt.H.MansourFaculty of Engineering., El-Mansoura University., Mansoura Egypt.I. A.El-AwadiFaculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>The problem of the unsteady infiltration from buried pipes into unsaturated soils is solved numerically using the Alternating Direction Implicit (ADI) difference method. The water content distribution and the location of the wetting front can be predicted at any Instant of time</strong><strong>.</strong>
<strong> </strong>https://bfemu.journals.ekb.eg/article_173227_ff069a44ada19e4ed60c7173ef3efebd.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529On the Turbulent Flow past Cambered Bodies with Blowing.576717322810.21608/bfemu.2021.173228ENGamal Ibrahim AhmedSolatanAssistant Professor., Mechanical Power Engineering Department., El-Mansoura University., Mansoura., Egypt.A.El-HadikMechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.M. A.El-HefnyMechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>This paper investigates, both experimentally and analytically, the heat and fluid flow around the trailing edge of a film cooled gas turbine blade. In the analysis, steady state, two dimensional, incompressible, recirculating turbulent flow is considered. The momentum and energy equations are derived and transformed to the generalized format of Gosman and et al (2). The kinetic energy and dissipation term of turbulence (i.e. the k-E, model) is con sidered in the turbulence computational programs. Small number of empirical constants were obtained from both the mathematical model and the conducted experimental work. These mathematical constants provide the most realistic predictions of heat transfer coefficients, when compared with the available experimental data. </strong><strong><br /> <strong>The investigation considers varying Reynolds number in the range of 6.25 x 10<sup>4</sup> to 1.29 x 10<sup>5</sup>. </strong><br /> <strong>There is a satisfactory agreement between the present experimental and theoritecal results, for the blowing parameter (M = Uc/U </strong></strong><strong>͚</strong><strong> ) in the range from zero to one. </strong><strong><br /> </strong><strong> </strong><strong><br /> <strong> </strong><br /> <strong> </strong></strong><br /> <strong> </strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_173228_946c132098f537ae5baf79043dd79883.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Computations of Turbulent Flow Characteristics and Heat Transfer on Forward-Facing Steps.688717323210.21608/bfemu.2021.173232ENA. A.El-HadikMechanical Engineering Department., Faculty of Technological Studies., KuwaitM. Y.SalamMechanical Engineering Department., College of Engineering & Petroleum
Kuwait University., KuwaitJournal Article19881010<strong> <strong>Numerical calculations of heat transfer and flow field characteristics of turbulent recirculating flows on forward-facing steps are presented in this paper. The calculations are based on the (k - </strong><strong>ɛ</strong><strong>) model. In the vicinity of the wall a linear vorticity distribution model was used. The (k - </strong><strong>ɛ</strong><strong>) model has improved to account for the streamline curvature and the Reynolds stresses, and the computer program was also improved with a finite difference and iterative technique. </strong><strong><br /><strong>The present results include computed heat transfer coefficients, streamlines and isothermal lines, velocity profiles and kinetic energy distributions at different Reynolds numbers and different step heights. </strong><br /><strong>One of the significant results in this study is the influence of the step height on the size and location of the separation region and reattachment point. It was found that the heat transfer mechanism is positively influced by larger step sizes. The size of the isothermal lines becomes smaller and closer to the wall by larger steps. This result is noticed both upstream and downstream of the step. </strong><br /><strong> </strong></strong></strong><br /> <strong> </strong><br /> https://bfemu.journals.ekb.eg/article_173232_9562fafd9fc162a71782655f0423413d.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529On an Integral Equation Method for a Linearized Version of the Navier-Stokes Equation.889717323710.21608/bfemu.2021.173237ENMohamed Nabil Saad El-DinSabryAssistant Professor., Mechanical Power engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article20211010 <strong>The regular reductive integral equations method, developed earlier to solve creeping flow problems, is considered. This method required merely the solution of a scalar integral equation on the boundary of the domain. Through a judicious linearization and transformation of variables, this method is extended to include cases with non-negligible convective term. This new technique is applied to the hydrodynamic entrance zone in a rectangular duct of infinite length. </strong><strong><br /></strong><br /> <strong> </strong><br /> <strong><strong> </strong><br /> <strong> </strong><br /> <strong> </strong><br /> <strong> </strong><br /> <br /> </strong>https://bfemu.journals.ekb.eg/article_173237_258354fb80775f971e67f0120ae07ef3.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Water Classification or El-Bahr El-Sagheir.11417325610.21608/bfemu.2021.173256ENGar Al-AlamRashedAssociate Professor., Physical Science Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.A. E.BastawissiAssistant Professor., Physical Science Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.M. M.El-DesoukyMilitary Technical College., Cairo., Egypt.M.El-KomyFaculty of Engineering., (Shoubra), Zagazig University.Journal Article19881010https://bfemu.journals.ekb.eg/article_173256_51290dbac5e5b1d30709972c0c6f5ef1.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529On the Use of Polyelectrolytes in Water and Wastewater Treatment.152617326310.21608/bfemu.2021.173263ENGar Al-AlamRashedAssociate Professor., Physical Science Engineering Department., FACULTY OF Engineering., El-Mansoura University., Mansoura., Egypt.M. A.El-KomyDepartment of Physical Science., Faculty of Engineering., (Shoubra)., Benha Branch., Zagazig University., Egypt.M. M.El-DessoukyDepartment of Chemical Engineering., Military Technical College., Cairo., Egypt.Journal Article19881010<strong>Synthetic or natural polyelectrolytes have an important role to play in the treatment of water and wastewater. In this article, a comperhensive review on the different uses of polyelectrolytes in the fields of potable and industrial water supply and industrial and municipal effluent treatment have been discussed. </strong><strong><br /> <strong>Polyelectrolytes have been used for different purposes in the field of potable water supply such as : removal of organic matter, suspended solids, bacteria, algae, trihalomethane precursors, colour and turbidity, water softening, desalination, improvement of mass transfer zone of ozone used for disinfection and it improve the process of direct filtration and the management of water treatment sludge. In the field of industrial effluent treatment polyelectrolytes have been applied in : trace metal removal, dissolved air flotation process, radioactive effluent treatment, conditioning anaerobically digested sludge, treating oil contaminated industrial wastewater treatment of tannery effluents, removal of suspended solids from time-sulfied unhairing effluents, detoxification and decolorization of kraft pulp mill effluents, ore enrichment plant waste water containing sprucewood tannins. </strong><br /> <strong>Polyelectrolytes, generally, have revolutionised the treatment processes, increasing the efficiency of the processes to a level which could not be dreamt of in the past, reducing the cost of chemicals required, producing compact relatively smaller quantities of compact sludge that can drained and disposed of easily and simplifying handling and dosing of the chemicals. </strong><br /> <strong> </strong><br /> <strong> </strong></strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_173263_0c9cbc21507a70b27fc3de5d5f42c478.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Preparation and Characterization of some Polyalkylarylamines.273717326610.21608/bfemu.2021.173266ENA.ShaabanDepartment of Chemistry., Faculty of Science., Zagazig University (Benha Branch).,
Benha., Egypt.M. A.El-KomyDepartment of Physical and Mathematical Science., Faculty of Engineering (Shoubra).,
Zagazig University., (Benno Branch., Cairo., Egypt.A. A.Al-SarwyDepartment of Physical and Mathematical Science., Faculty of Engineering (Shoubra).,
Zagazig University., (Benno Branch., Cairo., Egypt.I. Gar Al-AlamRashedAssociate Professor., Department of Physical Science., Faculty of Engineering., Mansoura University., El-Mansoura., Egypt.Journal Article19881011<strong><strong><strong><span>Adducts of polyalkylarylamines will stoichiometric amounts of stannous chloride were obtained by the reaction of 1,2-dichloroethane with m-phenylenediamine, p-phenylenediamine and 4,4 diaminodiphenyl in the presence of hydrochloric acid and stoichiometric amounts of stannous chloride in methanol as a solvent. Also, adduct of poly (chloromethyne-co- 4,4-dianiinodiphenyl) was obtained from the reaction of chloroform and benzidine by similar method. The structure of these adducts was confirmed by JR spectroscopy, as well 0.X-ray diffractometery, These adducts when reacted with aqueous solution of ammonium carbonate gave the corresponding polyalkylaryl-amine hydrochlorides. Also thermal analysis of these adducts were carried out .</span></strong> </strong><br /> </strong>https://bfemu.journals.ekb.eg/article_173266_7b7b4661ae4ce5f932b43fab73e86340.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Some Polyalkylarylamines as a Coagulant Aid in Water Treatment.384817326810.21608/bfemu.2021.173268ENM. A.El-KomyAssistant Professor., Department of Physical and Mathematical Science., Faculty of Engineering (Shoubra)., Zagazig University., (Benha Branch)., Cairo., Egypt.I.RashedAssociate Professor., Department of Physical Science., Faculty of Engineering, El-Mansoura University.,
El-Mansoura., Egypt.A. F.ShaabanDepartment of Chemistry., Faculty of Science., Zagazig University., (Benha Branch)., Benha., Egypt.A. A.Al-SarwyDepartment of Physical and Mathematical Science., Faculty of Engineering (Shoubra), Zagazig University., (Benha Branch)., Cairo., Egypt.Journal Article19881011<strong>Poly (ethylene-co-p-phenylene diamine) hydrochloride, poly (aminomethine co-4, 4<sup>-</sup> diaminodiphenyl) hydrochloride and poly (ethylene-co-4, 4<sup>-</sup> diaminodiphenyl) hydrochloride were used to remove turbidity from synthetic turbid water, prepared as fine clay suspension is top water. These compouds displayed typical polyelectrolyte behaviour either alone or in combination with alum. They were put neutral (pH 7) and basic (pH 10) mediums.</strong><strong><br /> <strong> Laboratory studies have shown that these compouds give good performance individually in acidic medium, where in neutral medium they give good performance, only, in combination with alum. </strong><br /> <strong> </strong><br /> <strong> </strong></strong>https://bfemu.journals.ekb.eg/article_173268_56585ad75a00bedf8a0de7887635a59a.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Regeneration of Powdered Activated Carbon Exhausted during Glycerine Bleaching.495817327110.21608/bfemu.2021.173271ENI.RashedAssistant Professor., Physical Science Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.A. E.BastawissiAssistant Professor., Physical Science Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>Powdered activated carbon exhausted during glycerine bleaching can be regenerated and reused again. Glycerine retained by the exhausted carbon con be recovered before the regeneration process. Optimum glycerine recovery conditions were found to mix, efficiently, 4 parts (by weight) of wash water per part of exhausted carbon for half an hour a 80-8<sup>5o</sup>C. About 36%, by weight from exhausted carbon was recovered as by this technique. </strong><strong><br /> <strong>Above 85% of the activity of the exhausted powdered activated carbon can be restored by thermal regeneration. Best results were obtained on the exhausted powdered activated carbon for an hour at a temperature of 500°C or higher. </strong><br /> <strong> </strong><br /> <br /> </strong>https://bfemu.journals.ekb.eg/article_173271_84e6914ea004e16d73de120ca23bfcc9.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Effect of Weave Angle on the Geometrical Properties of Square Plain Fabrics of Circular and Elliptical Thread Cross Sections.11417327610.21608/bfemu.2021.173276ENHemdan Abdo AliAbou-TalebAssistant Professor., Textile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Ahmed Sami Moustafa AhmedEl DeebAssistant Professor., Textile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>A gen</strong><strong>eral theoretical </strong><strong>a</strong><strong>pproach is </strong><strong>pr</strong><strong>esented f</strong><strong>o</strong><strong>r a geometrical model of square plain woven fabric, allowing the threads to be compressed to an elliptical cross section provided t</strong><strong>hat th</strong><strong>eir circumferenc</strong><strong>e </strong><strong>i</strong><strong>s </strong><strong>constant. T</strong><strong>he </strong><strong>limitation </strong><strong>of </strong><strong>t</strong><strong>he a</strong><strong>ssumed model i.e. jamming condition represent</strong><strong>ed by </strong><strong>weave angle was c</strong><strong>o</strong><strong>mput</strong><strong>ed </strong><strong>a</strong><strong>nd </strong><strong>the </strong><strong>r</strong><strong>elation between wrap angle a</strong><strong>nd </strong><strong>weave </strong><strong>angle </strong><strong>was als</strong><strong>o ob</strong><strong>taine</strong><strong>d </strong><strong>for different value</strong><strong>s of </strong><strong>flattening f</strong><strong>ac</strong><strong>tor. Mathematical relations </strong><strong>b</strong><strong>etwee</strong><strong>n cov</strong><strong>e</strong><strong>r {a</strong><strong>cto</strong><strong>r, </strong><strong>crimp percentage, relative f</strong><strong>abri</strong><strong>c weight </strong><strong>an</strong><strong>d weav</strong><strong>e an</strong><strong>gle were then possible to </strong><strong>b</strong><strong>e computed a</strong><strong>t </strong><strong>different values of flattening factor. </strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_173276_9f5e5a70a6625879f462d8aef8128d88.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529Analysis of the Residual Yarns in the Doffed Packages from Warp Creel.152217327910.21608/bfemu.2021.173279ENA.ShahinTextile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>By changing the packages on the warping Creel the doffed packages have</strong><br /> <strong> a residual amount of yarns. These yarns were statistically analysed for a Benninger</strong><br /> <strong> V - warping creel. </strong><br /> <strong>Some different factors affect the amount of residual yarns such as: </strong><br />-<strong> adjustment of the maximum diameter for the package during winding process</strong><br /><strong>- adjustment of tension yarn-brake on the winding unit</strong><br /><strong>- degree of contact pressure between package and winding drum.</strong><br /><strong>- type of winding and its characteristics </strong><br /> <strong>Some of these factors were measured and theoretically analysed. </strong><br /> <strong> </strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_173279_350281d284c2567b763bb300fe18446a.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210529A Study of Dynamic Yarn Tension on Two-for-One Twister.233517328310.21608/bfemu.2021.173283ENM.SalamaTextile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.S.IbrahimTextile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.R.FaragTextile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>Yarn tension during manufacturing has a large influence on the processing efficiency, yarn properties, and hence on fabric characteristics. In this work the dynamic yarn tension on two-for-one twister was investigated and the effect of various parameters on the dynamic yarn tension were studied. A test set-up unit was built to simulate the Two-for-one twister, so the effect of spindle speed, winding velocity and feed package dimensions on dynamic yarn tension was investigated. It was found that the yarn tension at the eye slightly changed when the spindle speed increased up to 5500 r.p.m. The yarn tension was highly affected by the increase in spindle speed above 5500 r.p.m.. It was also found that the wrap angle changed when the feed conditions in terms of feed package dimensions, spindle tension and winding velocity were changed to mentain a constant yarn tension at the eye. The increase of productivity of the Two-for-one twister causes an increase in the yarn tension at the eye. Statistical analysis was carried out to find the effect of the various parameters on yarn tension and to verify the experimental results. </strong><strong><br /> <strong> </strong><br /> <strong> </strong><br /> <strong> </strong></strong><br /> <strong> </strong><br /> <strong> </strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_173283_4d602ded2e8b10ee705faa3dcd8d6471.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210801The Morphology of Layered Non-Woven Fabrics.364518959010.21608/bfemu.2021.189590ENAdel Mohamed AliEl-HadidyAssistant Professor., Textile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>The morphology of layered NW fabrics has been studied in terms of fabric thickness (t<sub>L</sub>), packing density coefficient (Ø<sub>L</sub>), fabric hardness (H<sub>L</sub>), and energy-absorbed index (b<sub>L</sub>). All these terms are obtained when the fabric is subjected to compression. For multi-layer NW fabric, energy-absorbed index was found to increase as fabric hard ness decreases. The product of fabric hardness and compression energy index for all tested NW fabrics is constant, i.e. Hb = 435. Also it was found that as the no. of layers increase the multi-layered thick ness and/or mass per unit area is increase While the packing density coefficient. of multi-layer NW fabric has minor differences between Ø<sub>s</sub> and Ø<sub>L .</sub></strong><strong><br /> <strong> </strong></strong><br /> <strong> </strong>https://bfemu.journals.ekb.eg/article_189590_3bad2c676d40ed8763c13e722d35778a.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210801Effect of Yarn Characteristic on Yarn Tension during Unwinding from Package.465418960410.21608/bfemu.2021.189604ENA.ShahinTextile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.I.RakhaTextile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>The object of this work was to study the influence of yarn surface finish on yarn tension during unwinding from package, the yarn tension was measured under the effect of different yarn characteristics such a</strong><br /> <br /> <strong>- Double yarn - <strong>Bleached yarns</strong></strong><br /> <br /> <strong>- Dyed Yarn - <strong>Singed Yarns</strong></strong><br /> <br /> - <strong>Mercerized Yarns - <strong>Waxed yarns</strong></strong><br /><strong>It was found that the value of yarn tension related to the characteristics of the yarn surface. In order to ensure that these results are correct the coefficient of frictions for these different were measured.</strong><br /><br /><br /><br /><br /> <br /> <br /> <strong> </strong><br /><br />https://bfemu.journals.ekb.eg/article_189604_7ba1c85e2814fa62363ab5c80832a07c.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210817Effect of the Deflection of Squeezing Rollers in Sizing Box on the Sized Yarns.556218973010.21608/bfemu.2021.189730ENA.ShahinTextile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>In this work the percentage of sizing material in the yarn was measured across the warp sheet after the sizing process.</strong><br /> <strong>The considered parameters in this experiment are :</strong><br /> -<strong>Yarn count</strong><br /> -<strong>Yarn material </strong><br /> <strong>The deflection of squeezing rollers affect the distribution of the sizing material across the warp sheet. It was found that, the percentage of the sizing material in the middle of the warp sheet is higher than in sides.</strong><br /> <strong>The deflection of squeezing rollers was theoretically calculated for a Zell-sizing machine.</strong>https://bfemu.journals.ekb.eg/article_189730_06dd874b82b6049ef47a4609aebd7772.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210817A Study of Yarn Insertion Using Two Air Jet Nozzles.637418973510.21608/bfemu.2021.189735ENMahmoudSalamaTextile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>In the present work, the mutual effect of air pressure at nozzles and position of back nozzle with respect to main nozzle on initial air drag, final air drag and yarn insertion time is analysed. This simulate a multi color air jet insertion system. Factorial design technique using Box and Hunter method is applied. The analysis shows that the air pressure and the position of the back nozzle in terms of its distance from the main nozzle and the angle between the nozzles axes have a significant effect on air drag and yarn insertion. This helps in selecting a suitable position of the back nozzle to get a small yarn insertion time is at a considerable air pressure.</strong>https://bfemu.journals.ekb.eg/article_189735_d37fb684afbd3b3070041b1c48d50db1.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210818An Approach to the Optimization of Sewing Conditions.9310818974610.21608/bfemu.2021.189746ENHemdan AbdoAli Abo-TalebAssistant Professor., Textile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>The study reported in this work concerns the influence of sewing conditions such as the distance between seam line and fabric edge, seam direction (cutting angle relative to weft yarns), number of stitches per unit length of seam and the linear density of sewing threads on the seam breaking strength and extension of woven fabrics for both double lock and single-thread chain stitches. The application of fractional factorial design to optimize the operating conditions of sewing machine is demonstrated. The optimum sewing conditions when using double lock stitch are the distance between seam line and fabric edge is 2cm, the seam line is parallel to the selvedge using 5 stitches/cm and the linear density of sewing thread is 70/3 Ne. But when using single thread chain stitch the optimum conditions are the distance between seam line and fabric edge is 1 cm, the seam line is parallel to the selvedge using 3 stitches/cm of 50/3 Ne sewing thread count. Also the optimum sewing conditions for seam extension could be determined for both the double lock and the single – thread chain stitches. When using single – thread chain stitch, it gives the highest seam strength and the lowest seam extension compared to the common double </strong><strong>lock stitch.</strong>https://bfemu.journals.ekb.eg/article_189746_bc3c9e4553320911e9530d81e8381bf7.pdfMansoura University, Faculty of EngineeringMEJ- Mansoura Engineering Journal1110-092313220210817Study of Variation of Weft Tension Behaviour during Unwinding from Shuttle.759218977310.21608/bfemu.2021.189773ENA. E.MorsyAssistant Professor., Textile Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.Journal Article19881010<strong>In the present work, the behaviour of dynamical weft tension during unwinding from shuttle have been studied. The phenomenon has been investigated considering the effect of yarn parameters, such as yarn count and hairness, traverse length of weft bobbin, unwinding speed from the shuttle and shuttle tension. The experiments were carried out by varying all factors at two different levels using 2<sup>5</sup> factorial design technique.</strong><br /> <strong>The unwinding tension corresponding to the tip and base of weft bobbin as well as the differences between the two position tension curves (A-Q), is recorded and statistically evaluated.</strong><br /> <strong>The results indicated that the weft tension variation was found to be affected significantly by: weft yarn count, unwinding speed and shuttle tension. In terms of two and three factor interactions, the results show : weft count with shuttle tension (x<sub>3</sub> x<sub>5</sub>), as well as count with unwinding speed, and shuttle tension (x<sub>3</sub> x<sub>4</sub> x<sub>5</sub>) affect significantly on the weft tension variation.</strong>https://bfemu.journals.ekb.eg/article_189773_0d1cffe88f068f1782bf13c8bf7260a8.pdf