粘性流体在毛细填充动力学中的固有角动量的影响。
Effect of intrinsic angular momentum in the capillary filling dynamics of viscous fluids.
机构信息
Department of Mechanical Engineering, 10-367 Donadeo Innovation Center for Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
Department of Mechanical Engineering, 10-367 Donadeo Innovation Center for Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada.
出版信息
J Colloid Interface Sci. 2016 Oct 1;479:80-86. doi: 10.1016/j.jcis.2016.06.055. Epub 2016 Jun 24.
In this study, an analytical model is provided to describe the filling dynamics of a capillary filled with a viscous fluid containing spinning particles. The aim is to demonstrate the effect of angular momentum on the capillary filling dynamics of molecular fluids which has not been explored before. The presence of spinning particles generates additional coefficients of viscosity, namely, spin viscosity and vortex viscosity, which couples rotational and translational movements. Three different time stages have been noticed during the capillary filling phenomenon: inertia force dominated, visco-inertial, and viscous-dominated regions. The last two regions are found to be mainly affected by the spinning particles. An increase in the spin and vortex viscosities is found to increase the viscous force and thus reduce the front position of the moving liquid. The results of this study are validated using the literature no-angular-momentum (NAM) base-case results and an excellent agreement is observed.
在这项研究中，提供了一个分析模型来描述一个充满粘性流体的毛细管的填充动力学，其中包含旋转粒子。目的是展示以前尚未探索过的角动量对分子流体的毛细管填充动力学的影响。旋转粒子的存在会产生额外的粘度系数，即旋转粘度和涡度粘度，它们会耦合旋转和平移运动。在毛细管填充现象中注意到了三个不同的时间阶段：惯性力主导、粘惯性和粘性主导区域。发现后两个区域主要受旋转粒子的影响。发现自旋和涡度粘度的增加会增加粘性力，从而降低移动液体的前缘位置。使用文献中无角动量（NAM）基础案例的结果验证了本研究的结果，观察到了极好的一致性。
Zotero 插件