Heat Transfer and Fluid Flow in Falling Film of Vertical Tube Evaporation: A Numerical Solution.

El-Hadik, A. A.; El-Najem, N. M.; Darwish, M. A.

doi:10.21608/bfemu.2021.165057

Heat Transfer and Fluid Flow in Falling Film of Vertical Tube Evaporation: A Numerical Solution.

Document Type : Research Studies

Authors

¹ Mechanical Technology Department., Faculty of Technological Studies., Public Authority for Applied Education and Training, P.O. Box 42325., Zip Code 70654 Shuwaikh - Kuwait.

² Mechanical Engineering Department., Faculty of Engineering and Petroleum., University of Kuwait., 2.0. Box 5969 Safat., Kuwait.

³ Mechanical Engineering Department., Faculty of Engineering and Petroleum,. University of Kuwait., 2.0. Box 5969 Safat., Kuwait.

10.21608/bfemu.2021.165057

Abstract

The present work studies the heat transfer and fluid flow in a falling film of vertical tube evaporators numerically. A finite difference technique, with iterative method, has been applied in these solutions,
The flow is considered turbulent, cylindrical coordinates, and steady. Momentum, and energy equations are formulated in finite difference technique and computations are performed, utilizing Gauss-Seidal point iterative method to obtain an acceptable accuracy. Velocity developed and temperature distributions in a falling film have been obtained, and the heat transfer coefficient is calculated. The results have been compared with those obtained by others and a good agreement hag been found.