基于COMSOL Multi-physic的瓦斯抽采地面井的流场数值分析

THE flow-field numerical analysis of gas extraction ground wells based on COMSOL Multi-physic

由于煤层气在煤岩体中的运移过程极其复杂,因此用来描述其流场的数学模型常常是高阶非线性的偏微分方程,为了能更好的解决此类问题,本文采用多重物理量数值模拟软件COMSOL Multi-physic对所建的Darcy-Brinkman模型进行了模拟求解的研究,结果表明用该软件模拟的压力和速度动态曲线更符合实际情况,而且可以用动态可视化模块来模拟压降过程。

The flow-field mathematical model is higher order nonlinear partial differential equations generally because of the complex process of coal seam gas flowing through seams.It was reported that the COMSOL Multi-physic,multiple physical quantities numerical simulation software,was used to solve this type of problem,based no COMSOL Multi-physic,the numerical result of Darcy-Brinkman model was calculated.The conclusion showed that the dynamic values of gas pressure and gas flow speed which were worked out by COMSOL Multi-physic were accorded with the actuality,and the gas pressure reducing process can be simulated well by Dynamic visual module in COMSOL Multi-physic.