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

The modeling is sensitive to a variety of parameters. Both the radius of curvature and wetting cross-sectional area decrease with the increase of the axial distance, and approaches zero until the liquid film reaches the maximum wetting length (dryout point) in evaporative region. Less microgrooves dimensions lead to longer wetting length. The liquid wetting cross-sectional area decreases as inclined angles and contact angles increase. The average flow rate decreases with the increase of inclined angle for microgrooves under the same heat flux. It increases at first, and then decreases with the axial direction of the microgrooves.