Design & CFD Analysis on Heat Transfer of CPU with Varying Fins

Thermal Engineering

In present work, CFD prediction is done for thermal performance evaluation of square cross section fins arranged in inline manner by using FLUENT 14.0 solver. The standard K epsilon model and pressure based solver was used for completing the analysis and getting the desired thermal effects in heat sink. Aluminum was used as a solid material of fins for its high thermal conductivity and lower cost, air was used as a fluid for doing the operation. It is observed from all the figures that the boundary conditions are satisfied asymptotically in all the cases which support the accuracy of the numerical results. In this thermal analysis, temperature variations with respect to distance at which heat flow occur through the fin is analyzed. The extensions on the finned surfaces are used to increase the surface area of the fin in contact with the fluid flowing around it. In this work, parallel plate heat sink of the same volume as that of square cross section fins are compared with parallel pate straight fins for higher heat transfer rate. This research work proposed that square cross section fins give better result of heat transfer under the same boundary conditions with higher efficiency.

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