摘要
液滴的流动蒸发换热是一个即常见又基础的问题,对液滴的流动蒸发换热进行准确的描述对许多工程实际及科学研究都有很重要的意义。对于这样一个多相、多组分输运的物理过程,本文使用VOF方法对液滴形态进行描述,建立动力学蒸发模型对液滴的蒸发过程进行刻画,同时在气相中使用组分输运方程最大程度上还原了液滴蒸发的物理过程。本文使用所建立的数值方法对正庚烷液滴的自然对流蒸发及强迫对流蒸发进行了数值模拟计算,与实验结果吻合良好。
Dropwise evaporative cooling process is a common and fundamental problem and is widely used in many areas of engineering.The Volume of Fluid（VOF） model with variable-time stepping was used to capture the time-dependent liquid-gas interface motion throughout the computational domain with the kinetic theory model used to predict the evaporation rate at the liquid-gas interface.The species transport equation was solved in the gas phase with the VOF model to accurately describe the evaporation process.The numerical model was validated by experiments.The results shows that the numerical model predicts the evaporation process well,so this model can be used to simulate droplet flow dynamics,heat transfer and evaporation.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2016年第3期637-642,共6页
Journal of Engineering Thermophysics
基金
国家"973"项目(No.2012CB933200)
国家自然科学基金(No.51406100)
国家自然科学基金创新研究群体科学基金(No.51321002)
关键词
液滴
对流
蒸发
droplet
convection
evaporeation
