Thermal transport investigation and parametric study in cylindrical oblique fin minichannel heat sink

Abstract

A novel cylindrical oblique fin minichannel heat sink was proposed to be fitted over cylindrical heat sources. Its cooling effectiveness was compared with conventional straight fin minichannel heat sink through experimental and numerical approaches for the Reynolds number ranging from 50 to 500, with excellent agreement. To optimize and analyze the cylindrical oblique fin heat sink, a similarity analysis and parametric study on the geometric dimensions of the heat sink were performed. Three dimensional conjugated heat transfer simulation using Computational Fluid Dynamics (CFD) approach was conducted by varying the oblique angle from 20? to 45?, the secondary channel gap from 1mm to 5mm and the Reynolds number from 200 to 900. Based on the 259 numerical data points, multiple correlations were formulated, verified and presented. In addition, the influences of edge effect on flow and temperature uniformities were also investigated for oblique fin structures through numerical and experimental studies.