中文摘要：

细小孔隙喉道下流体流动呈非线性流动,达西定律不适用,非线性流动的机理认识不清.在现有微尺度流动实验和理论基础上,分析影响多孔介质中流体流动的微观力种类和作用范围及对流动的影响,建立考虑固液间范德华力的圆管流动数学模型.结果表明:对比泊肃叶流动下的速度分布和平均流量,随着微管尺寸的减小,固液间的范德华力作用增大,流体在微管内的流动规律影响也增大,因此固液间范德华力作用在细小孔隙流动中不可忽略.

英文摘要：

Darcy’s law is found be not applicable to fluid flow in small pore throat,and the mechanism for the nonlinear flow is still unclear to date.The paper analyzed the influence of various types of micro forces in porous media on fluid flow,based on the existing experimental results and theoretical knowledge of micro-scale flow.Mathematical model for flow in small tube was established with the consideration of Van der Waals force between solid and liquid.By simulating velocity distribution and the average flow under the poiseuille flow,we get that with the decrease of the micro tube size,the Van der Waals force between solid and liquid increases and the effect on flow pattern of fluid in the tube increases,so that the Van der Waals force between solid and liquid in the tiny pore flow should not be ignored.