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Heat transfer and convection of evaporating sessile droplets in transition from superhydrophilic to superhydrophobic structured wall: Optimization of functional properties
International Communications in Heat and Mass Transfer ( IF 7 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.icheatmasstransfer.2019.104474 S.Y. Misyura
International Communications in Heat and Mass Transfer ( IF 7 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.icheatmasstransfer.2019.104474 S.Y. Misyura
Abstract The free convection and heat transfer of evaporating water droplets on a textured wall have been studied. The analysis of the influence of micro- and macrotextures on the heat transfer coefficient has been performed. Structured surfaces were created by two different methods: mechanical surface treatment and laser exposure. The behavior of heat transfer on a structured wall was compared with that on a smooth surface. The wettability of the wall varied over a wide range of contact angles (the transition from a superhydrophilic to a superhydrophobic surface was considered). Simple relations have been obtained to estimate the separate influence of several key factors (the drop height, the surface area of the wetted spot of the drop, the convection velocity in the liquid and the temperature difference in the drop). The obtained data are important for designing heat exchangers with structured walls and for optimizing the functional properties.
中文翻译:
从超亲水结构壁过渡到超疏水结构壁的蒸发固着液滴的传热和对流:功能特性的优化
摘要 研究了纹理壁上蒸发水滴的自由对流和传热。已经进行了微观和宏观纹理对传热系数的影响的分析。结构化表面是通过两种不同的方法创建的:机械表面处理和激光曝光。将结构壁上的传热行为与光滑表面上的传热行为进行了比较。壁的润湿性在很宽的接触角范围内变化(考虑了从超亲水表面到超疏水表面的过渡)。已经获得了简单的关系来估计几个关键因素(液滴高度、液滴湿点的表面积、液体中的对流速度和液滴中的温差)的单独影响。
更新日期:2020-03-01
中文翻译:
从超亲水结构壁过渡到超疏水结构壁的蒸发固着液滴的传热和对流:功能特性的优化
摘要 研究了纹理壁上蒸发水滴的自由对流和传热。已经进行了微观和宏观纹理对传热系数的影响的分析。结构化表面是通过两种不同的方法创建的:机械表面处理和激光曝光。将结构壁上的传热行为与光滑表面上的传热行为进行了比较。壁的润湿性在很宽的接触角范围内变化(考虑了从超亲水表面到超疏水表面的过渡)。已经获得了简单的关系来估计几个关键因素(液滴高度、液滴湿点的表面积、液体中的对流速度和液滴中的温差)的单独影响。