Boundary Handling for Non-Newtonian Fluid Simulation

被引：0

作者：

Zhang, Yalan ^{[1
]}

Ban, Xiaojuan ^{[1
]}

Xu, Yanrui ^{[1
]}

Liu, Xing ^{[1
]}

机构：

[1] School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing,100083, China

来源：

Jisuanji Fuzhu Sheji Yu Tuxingxue Xuebao/Journal of Computer-Aided Design and Computer Graphics | 2019年 / 31卷 / 08期

关键词：

Iterative methods - Non Newtonian liquids - Flow measurement - Hydrodynamics - Viscous flow - Rheology - Friction - Non Newtonian flow;

D O I：

10.3724/SP.J.1089.2019.17576

中图分类号：

学科分类号：

摘要：

To solve the problem of unreasonable boundary conditions of the existing SPH non-Newtonian fluid simulation, a boundary handling method is proposed. First, a unified modeling of Newtonian and non-Newtonian fluids was implemented by Cross model. Then, by calculating the weighted sum of solid boundary particles, a normal vector of the boundary force was set for the fluid particles at the boundary. Finally, the velocity of fluid particles near the boundary was iteratively updated using Coulomb friction boundary conditions, which can be integrated into the predictive-corrective algorithm framework. Experiments show that the friction coefficient of the fluid-solid boundary can be adjusted according to the user's experimental needs. Compared to simulation under free-slip boundary conditions, the non-Newtonian fluid simulated by our method is able to increase in viscosity with the decrease of velocity and exhibit physical properties of solids. © 2019, Beijing China Science Journal Publishing Co. Ltd. All right reserved.

引用

页码：1341 / 1349

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