刘永忠,王乐

• 1:西安交通大学化工系

摘要(Abstract)：

多孔介质中超临界流体的可调性与流体流动与传热耦合过程密切相关。今针对各向同性二维正方形区域建立了多孔介质中超临界流体的流动与传热耦合传递过程数学模型。以超临界CO2为模型流体,采用COMSOL Multiphysics软件对模型方程进行数值求解。分析和讨论了多孔介质中温度梯度对超临界流体的流动特性和传递性质的影响特性。研究表明:温度梯度显著地影响计算区域中流体的速度分布,近加热壁区的流体出现了速度的加速层。流体的动力黏度和导热系数等性质的分布特性也受计算区域中温度梯度的作用而存在极小值,导致局部流动性能的提高和传热性能的下降。对于多孔介质中超临界流体的可调性,可通过边界上的温度梯度加以调节和控制。

关键词(KeyWords)： 超临界流体;多孔介质;可调性;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(20876123)

作者(Author): 刘永忠,王乐

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