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Contact line behavior for a highly wetting fluid under superheated conditions

机译:过热条件下高润湿性流体的接触线行为

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摘要

The contact line behavior of a highly wetting, dielectric liquid (FC-72) droplet under superheated conditions is investigated. Relatively large macroscopic contact angles atypical of FC-72 droplets were observed under superheated conditions. The addition of a non-condensable dissolved gases in the system increased the contact angle at a given superheat. Numerical simulations of the transport phenomena near the microscopic three phase contact line were performed that show how the macroscopic contact angle is related to the superheat and thickness of the adsorbed film ahead of the contact line. The use of a macroscopic contact angle that is a function of superheat in established models for bubble departure diameter and the onset of nucleate boiling enhanced the ability of those models to describe the behavior of highly wetting fluids.
机译:研究了在高温条件下高度润湿的介电液体(FC-72)液滴的接触线行为。在过热条件下观察到相对较大的非典型FC-72液滴宏观接触角。在系统中添加不可冷凝的溶解气体会增加给定过热条件下的接触角。对微观三相接触线附近的传输现象进行了数值模拟,表明宏观接触角与接触线之前的过热度和吸附膜的厚度如何相关。在已建立的气泡离开直径模型和核沸腾开始的模型中,宏观接触角的使用是过热的函数,从而增强了这些模型描述高润湿性流体行为的能力。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第10期|p.2664-2675|共12页
  • 作者单位

    Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA;

    Institute of Technical Thermodynamics, Center of Smart Interfaces, Technische Universitat Darmstadt, Darmstadt, Germany;

    Institute of Technical Thermodynamics, Center of Smart Interfaces, Technische Universitat Darmstadt, Darmstadt, Germany;

    Rensselaer Polytechnic Institute, Troy, NY 1218, USA;

    Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    contact angle; contact line; highly wetting fluids; evaporation;

    机译:接触角;接触线;高润湿性液体;蒸发;

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