Study on the characteristics of the capillary wetting and flow in open rectangular microgrooves heat sink

摘要

This study presents a computational model in terms of capillary wetting and flow occurring in open rectangular microgrooves heat sink. This specific microgrooves heat sink, used at inclined angle position applications, is characterized by high heat transfer coefficient. Based on classical conservation equations and the generalized relationships of liquid thickness and geometric structures of microgrooves, the radius of curvature, wetting cross-sectional area and average flow rate along with the wetting length (axial direction) are numerically solved. A range of parameters including inclined angles, microgrooves dimensions and contact angles are considered in this computational model. The calculated values are verified by the experimental data. The standard error of calculated values compared with the experimental data is 2.7 x 10(-4) and 1.405 x 10(-8) when calculating the radius of curvature and wetting cross-sectional area.