基于二氧化碳封存的超临界两相流动的数值研究

The Numerical Investigation of Supercritical Two Phase Fluid Flow in Support of Carbon Dioxide Storage

格子Boltzmann方法(LBM)在计算复杂结构物理模型时具有独特优势并在模拟两相流动过程中能够高效清晰捕捉相界面。本文介绍了基于Shan-Chen多相模型的格子Boltzmann方法的理论成果以及基于二氧化碳封存的超临界两相流的模拟研究。结果表明,Shan-Chen模型在模拟两相流时符合Laplace定律,且两相层流时的速度分布和相渗曲线均与理论值吻合。二氧化碳封存过程中,较大的注入速率在提高二氧化碳残余俘获量的同时会降低其化学俘获量。

The lattice Boltzmann method(LBM) has its unique advantage in processing complex structure of physical model and is also an effective simulation method of studying two phase fluid flow to capture the interface.This paper is aimed to illustrate the principle of Shan-Chen model,theoretical analysis and the results involving carbon dioxide storage process.The results show that the data calculated by Shan-Chen model has a good agreement with Laplace's law,also according with the analytical velocity profile and relative permeability curve of two phase laminar flow.During the process of carbon dioxide storage,a high rate of injection will increase the amount of residual capture of carbon dioxide as well as decrease the amount of chemical capture.