多孔介质中非等温互溶流体驱替过程的格子Boltzmann研究  

Lattice Boltzmann Study on Displacement Process of Thermal Miscible Fluids in Porous Media

作　　者：居隆 张春华 陈松泽 郭照立[1] JU Long;ZHANG Chunhua;CHEN Songze;GUO Zhaoli(State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan,Hubei 430074,China)

机构地区：[1]华中科技大学煤燃烧国家重点实验室

出　　处：《计算物理》2019年第6期648-658,共11页Chinese Journal of Computational Physics

摘　　要：利用格子Boltzmann方法,在孔隙尺度上对多孔介质内非等温混溶驱替过程进行数值研究,定量分析温度粘性膨胀系数(βT)以及路易斯数(Le)对界面不稳定性和驱替效率的影响.结果表明:随着βT的增大,界面不稳定性增强,驱替效率降低.当βT> 0时,随着Le的增大,界面不稳定性减弱,驱替流体与被驱替流体之间的界面趋于平缓,指尖残余率减小,驱替效率增大.当βT<0时,Le对于驱替效率的影响相反.With lattice Boltzmann method,thermal miscible displacement process in porous media was investigated numerically in pore scale.Influence of thermal viscous diffusion coefficient(βT)and Lewis number(Le)on interface shape and sweep efficiency are quantitatively analyzed.It shows that with the increase ofβT,the instability of interface increases and the sweep efficiency decreases.AsβT>0,with increase of Le,interface instability decreases;Interface between displacement fluid and displaced fluid tends to be flat;Fingertip residual rate decreases and sweep efficiency increases.AsβT<0,effects of Le on sweep efficiency are opposite.

关 键 词：格子BOLTZMANN方法 非等温 流体驱替 孔隙尺度 驱替效率 

分 类 号：O357[理学—流体力学]