A three dimensional coupled VOF and Level set (VOSET) method with and without phase change on general curvilinear grids
A three dimensional coupled VOF and Level set (VOSET) method with and without phase change on general curvilinear grids
复制标题
一般曲线网格上有相变和无相变的三维耦合 VOF 和水平集 (VOSET) 方法
DOI：
10.1016/j.ces.2020.115705
复制
发表时间：
2020-09-21
影响因子：
4.7
通讯作者：
Wei, Jinjia
中科院分区：
文献类型：
--
作者：
Cao, Zhizhu;Zhou, Jie;Wei, Jinjia
开发了通用曲线网格上的 3D 耦合 VOF 和 LS 方法 (VOSET)，用于复杂域中的两相流模拟。通过用几何方法计算穿过每个面的流体体积分数通量多面体来更新体积分数随时间的演变。水平集函数是通过迭代几何运算得到的。导出基于水平集的连续表面张力模型来计算表面张力。随后，该模型和所提出的耦合界面跟踪方法被纳入 IDEAL（一种不可压缩的纳维-斯托克斯求解器）中。最后，在不规则区域上测试了静态气泡、球体变形、3D泰勒不稳定性增长、单个气泡上升、两个气泡合并和微通道流动沸腾等几个基准问题，以验证该方法的准确性和鲁棒性。结果与之前的文献结果吻合良好，表明该方法能够准确模拟复杂域中不可压缩的三维两相流。 (c) 2020 Elsevier Ltd. 保留所有权利。
A 3D coupled VOF and LS method (VOSET) on general curvilinear grids is developed for two-phase flow simulations in complex domains. The evolution of volume fraction with time is updated by calculating fluid volume fraction flux polyhedron passing through each face with geometrical approaches. The level set function is obtained by an iterative geometric operation. The level set based continuum surface tension model is derived to compute surface tension. Subsequently the model and the proposed coupled interfacial tracking method are incorporated into IDEAL, an incompressible Navier-Stokes solver. Finally, several benchmark problems including static bubble, sphere deformation, 3D Taylor instability growth, single bubble rising, two bubble merge and microchannel flow boiling are tested on irregular regions to validate the accuracy and robustness of the proposed method. The results show good agreement with previous literature results, indicating the present method is able to accurately simulate incompressible 3D two-phase flows in complex domains. (c) 2020 Elsevier Ltd. All rights reserved.