Numerical Simulation of Natural Convection Heat Transfer using Solid and Hollow/Perforated Pin Fin Heat Sinks.

Mousa, Ahmed Hamdy; Hegazi, Ahmed; Sultan, Gamal Ebrahim

doi:10.21608/bfemu.2020.95036

Numerical Simulation of Natural Convection Heat Transfer using Solid and Hollow/Perforated Pin Fin Heat Sinks.

Document Type : Research Studies

Authors

¹ Nile Higher Institute for Engineering and Technology, CO 35516, Egypt

² Mechanical Engineering Department, University of Mansoura, CO 35516, Egypt

³ a Professor at the Department of Mechanical Power Engineering, Mansoura University, Mansoura, Egypt

10.21608/bfemu.2020.95036

Abstract

Free convection heat transfer from circular solid and hollow/perforated pin fin heat sinks with different geometry and heat flux is numericallystudied using FLUENT ANSYS 16.0. The geometric dependence of heat transfers from heat sinks of solid and hollow/perforated fins with staggered pattern, attached on a fixed area heated base plate is discussed. A SIMPLE code is developed using control volume approach to solve governing equations (mass, momentum and energy), and the second order upwind technique is used. The results were carried out for a range of Rayleigh number, 9.3×10⁶> Ra> 1.63×10⁷. It showed that the performance of the hollow/perforated fin heat sink is higher than that for the solid fin heat sink. It is also investigated that hollow/perforated fin array with inner-to-outer diameter ratio (D_i/D_o=1/2) and perforation diameter (d_{p < /sub>_{< /sub>=6 mm) is the best sample giving the maximum performance and less amount of weight compared to the corresponding solid ones}}

Keywords