Heat transfer from replicated hydrophobic and transparent PDMS surface to a water droplet is considered. The laser texturing of alumina surface is carried out to obtain hydrophobic surface and later the textured surface is replicated by polydimethylsiloxane (PDMS) via a solvent casting method. An experiment is carried out to assess the water droplet pinning on the replicated inclined PDMS surface while keeping the replicated surface at uniform temperature (308 K). The flow and temperature fields inside the inclined water droplet are simulated in line with the experimental conditions. The flow velocities inside the droplet are validated through the data obtained from the particle imaging velocimetry (PIV). It is found that the velocity predictions agree well with the PIV data. The droplet heating results in a circulation cell inside the droplet due to the Marangoni and the buoyancy currents. Increasing inclination angle of the PDMS replicated surface enhances the maximum velocity inside the droplet, which is more pronounced for the large size droplets. The Nusselt and the Bond numbers increase with the inclination angle of the PDMS surface.

考虑了从复制的疏水性和透明PDMS表面到水滴的热传递。进行氧化铝表面的激光织构化以获得疏水性表面，然后通过溶剂浇铸方法通过聚二甲基硅氧烷（PDMS）复制纹理化表面。进行了一项实验，以评估水滴在复制的倾斜PDMS表面上的钉扎情况，同时将复制的表面保持在均匀的温度（308 K）下。根据实验条件对倾斜水滴内部的流场和温度场进行了模拟。通过从粒子成像测速仪（PIV）获得的数据验证液滴内部的流速。发现速度预测与PIV数据非常吻合。由于Marangoni和浮力流，液滴加热导致液滴内部形成循环池。PDMS复制表面的倾斜角度增加会增加液滴内部的最大速度，这对于大尺寸液滴而言更为明显。Nusselt和Bond数随PDMS表面的倾斜角度而增加。