In this study, a vapour-assisted drag reduction mechanism of texture surface with elevated temperature is explored. The computational fluid dynamics simulation is performed to understand the vapour membrane generated by the coupled effect of elevated temperature and surface texture. Simulation results indicated that elevated temperature may help generate the vapour membrane which can isolate the liquid water from the solid surface, thereby reducing friction. Meanwhile the introduction of surface micro-texture has dramatic positive effect in vapour volume fraction, vapour thickness and the average velocity of outflow. It was found that introducing the micro-texture to the elevated surface has dramatic positive effect in reducing frictional drag, the groove formed by the micro-texture can store vapour and form a vapour vortex inside, which may have a certain driving effect on the fluid.

中文翻译：

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高温织构表面蒸汽辅助液膜润滑减阻机理

在这项研究中，探讨了高温下纹理表面的蒸汽辅助减阻机制。执行计算流体动力学模拟以了解由升高的温度和表面纹理的耦合效应产生的蒸气膜。模拟结果表明，升高的温度可能有助于产生蒸汽膜，将液态水与固体表面隔离，从而减少摩擦。同时，表面微纹理的引入对蒸汽体积分数、蒸汽厚度和平均流出速度有显着的积极影响。研究发现，将微纹理引入升高表面对降低摩擦阻力具有显着的积极作用，微纹理形成的凹槽可以储存蒸汽并在内部形成蒸汽涡流，