摘要
为探究多孔材料中流体流动和温度变化,课题组对溶质和溶剂在孔隙内发生的多物理场耦合问题进行研究。首先,基于局部热非平衡理论(LTNE),分析发生的THMC耦合反应,推导出其控制方程组;其次,将其物理模型简化为内含圆孔无限大平面,通过COMSOL Multiphysics软件,选用一维轴对称坐标系模拟仿真,研究多孔介质应力、孔隙流体压力、溶质摩尔分数和流固体温度分布规律;最后,分析各物理场参数影响。结果表明:随时间增加,各因变量峰值和谷值逐渐沿径向伸展,各物理场之间相互影响愈加深远;反应过程中需衡量参数取值。该研究既可为相关实验和解析方法提供参考,也可直接应用于实际工程中,有助于深入了解饱和多孔介质热流固化完全耦合行为。
In order to explore the fluid flow and temperature change in porous materials,the multi-physical field coupling between solute and solvent in pores was studied.Firstly,the governing equations of the coupled model based on local thermal non-equilibrium theory were derived by analyzing the THMC(thermal-hydraulic-mechanical-chemical)coupling reaction.Posteriorly,the physical model was simplified as an infinite plane with a circular hole and the simulation of the one-dimensional axisymmetric coordinate system was realized by COMSOL Multiphysics software,then the distribution rules of stress of porous elastomer,pore fluid pressure,solute concentration and solid and fluid temperature were studied.Finally,the influence of parameters upon the previous mathematical model was analyzed.The results show that with the increase of time,the peak and valley of each dependent variable gradually extend along the radial direction,and the influence of physical fields is more profound mutually;parameter values are measured during the reaction.The research can not only provide reference for relevant experimental and analytical method,but also can be directly applied to practical engineering,which is of benefit to provide deep insights into the fully coupled thermal-hydraulic-mechanical-chemical behavior of saturated porous media.
作者
戴倩
李培超
DAI Qian;LI Peichao(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《轻工机械》
CAS
2022年第4期11-17,共7页
Light Industry Machinery
基金
上海市自然科学基金(19ZR1421400)。
关键词
饱和多孔介质
局部热非平衡理论
一维对称轴
THMC耦合模型
fluid-saturated porous media
LTNE(Local Thermal Non-Equilibrium)
one-dimensional axisymmetric
THMC(Thermal Hydrological Mechanical Chemical)coupling model
