Assessment of dynamic adaptive grids in Volume-Of-Fluid simulations of oblique drop impacts onto liquid films

JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS

卷:281

Article

Brambilla, P.¹  Guardone, A.¹ 

[1] Politecn Milan, Dept Aerosp Sci & Technol, I-20156 Milan, Italy

关键词: Drop impact;    Two-phase flow;    Dynamic adaptive grids;    Volume-Of-Fluid;    OpenFOAM;   

DOI  :  10.1016/j.cam.2014.12.030

来源: Elsevier

【 摘 要 】

Grid spacing dependence in three-dimensional numerical simulations of non-normal drop impact onto thin liquid films is assessed for different impingement angles and grid refinement levels. To describe the liquid phase dynamics, the Navier-Stokes equations are coupled to a Volume-Of-Fluid (VOF) model. Numerical simulations are performed with a modified version software OpenFOAM over a structured grid of hexaedra. Grid adaptation is carried out using an edge subdivision technique which results in non-conformal meshes. Grid convergence is assessed by monitoring integral parameters describing the dynamics of the post-impact free-surface waves. Starting from an initial grid spacing between D/8 and D/5, with D drop diameter, a refinement level of three is found to be sufficient to describe the diverse flow feature and to identify the splashing regime. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free