• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Analysis of fluid flow and particle transport in evaporating droplets exposed to infrared heating
【24h】

Analysis of fluid flow and particle transport in evaporating droplets exposed to infrared heating

机译：暴露于红外加热的蒸发液滴中的流体流动和颗粒传输分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Analysis of fluid flow and particle transport inside evaporating droplets exposed to external radiation was carried out by experiments and numerical simulations. In this study, we have shown that by altering the free surface temperature we can modify the fluid flow profile inside the droplet and hence the deposition pattern of solute particles on the substrate. The fluid velocity and particle concentration profiles inside the evaporating droplet were measured by Particle Image Velocimetry(PIV)technique. Experiments were carried out on a small sessile water droplet containing dispersed polystyrene particles. To avoid problem of image correction encountered in PIV measurements with 3D droplets, our experiments were performed on an equivalent disc shaped 2D drop sandwiched between two non-wetting surfaces, while the base of the droplet was pinned to a wetting surface. The top surface of the droplet was heated by Infrared(IR)light. The temperature of droplet surface was measured by thermocouples. The velocity field, particle concentration profile and particle deposition patterns were studied during evaporation process. We have also performed numerical simulations by solving continuity, momentum and energy transport equations. The computed velocity profiles resulting from buoyancy and Marangoni convection are in qualitative agreement with the experiments.
机译：通过实验和数值模拟对蒸发液滴内部的流体流动和颗粒传输进行了分析。在这项研究中，我们已经表明，通过改变自由表面温度，我们可以改变液滴内部的流体流动曲线，从而改变溶质颗粒在基材上的沉积方式。利用粒子图像测速技术（PIV）测量了蒸发液滴内部的流体速度和粒子浓度分布。在包含分散的聚苯乙烯颗粒的小无柄水滴上进行了实验。为了避免在使用3D小滴进行PIV测量时遇到的图像校正问题，我们的实验是在夹在两个非湿润表面之间的等效圆盘形2D小滴上进行的，而小滴的底部固定在湿润表面上。液滴的顶表面通过红外（IR）光加热。液滴表面的温度通过热电偶测量。研究了蒸发过程中的速度场，颗粒浓度分布和颗粒沉积模式。我们还通过求解连续性，动量和能量传输方程进行了数值模拟。由浮力和马兰戈尼对流产生的速度分布图与实验定性一致。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号