Lavi Becky, Marmur Abraham, Bachmann Joerg
Department of Chemical Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israel.
Langmuir. 2008 Mar 4;24(5):1918-23. doi: 10.1021/la702090x. Epub 2008 Jan 18.
The validity of using the Lucas-Washburn (LW) equation for porous media characterization by the two-liquid capillary penetration method was tested numerically and experimentally. A cylindrical capillary of known radius and contact angle was used as a model system for the tests. It was found that using the LW equation (i.e., ignoring inertia and dynamic contact angle effects) may lead to very erroneous assessment of the capillary radius and the equilibrium contact angle, for a relatively wide range of capillary radii and equilibrium contact angles. A correct assessment requires the application of a penetration kinetics equation that considers inertia and the dynamic contact angle.
通过数值模拟和实验测试了使用卢卡斯 - 沃什伯恩（LW）方程通过双液毛细管渗透法表征多孔介质的有效性。将已知半径和接触角的圆柱形毛细管用作测试的模型系统。结果发现，对于相对较宽范围的毛细管半径和平衡接触角，使用LW方程（即忽略惯性和动态接触角效应）可能会导致对毛细管半径和平衡接触角的评估非常错误。正确的评估需要应用考虑惯性和动态接触角的渗透动力学方程。
