Numerical study on heat and mass transfer characteristics of surface wettability

It has been shown that wettability has an important effect on the surface's heat transfer performance. In this article, the effects of different wettability of the surfaces of the micropillar array on the heat transfer performance under the same working condition (single-wettability and mixed-wettability surfaces) are compared by numerical simulation, the effects of the surface's geometrical structure on the flow state of the workpiece and the behavior of the bubbles are also described. It is found that the mixed wettability surfaces combine the characteristics of hydrophilic and hydrophobic surfaces can effectively reduce the wall temperature. The microcolumn array further enhances the boiling heat transfer effect by perturbing the flow process of the workpiece while increasing the heated area. The surface structure of the hydrophobic top combined with hydrophilic sidewalls can significantly improve the heat transfer performance by 10%similar to 40% during the stable boiling process. Design of a rectangular channel with a square column array coupling different wettability distributions.Analysis of the coupling of geometric structure and non-uniform wettability distribution on bubble behavior.The effect of different wettability distributions on the mechanism of bubble behavior is analyzed by numerical simulation.Four structural arrangement options, hydrophobic top combined with hydrophilic sidewalls for the most significant increase in heat transfer efficiency.