Iterative Brinkman penalization for simulation of impulsively started flow past a sphere and a circular disc

JOURNAL OF COMPUTATIONAL PHYSICS

卷:336

Article

Spietz, Henrik Juul¹  Hejlesen, Mads Molholm¹  Walther, Jens Honore^1,2 

[1] Tech Univ Denmark, Dept Mech Engn, Bldg 403, DK-2800 Lyngby, Denmark

[2] Swiss Fed Inst Technol, Computat Sci & Engn Lab, Clasiusstr 33, CH-8092 Zurich, Switzerland

关键词: Vortex method;    Brinkman penalization;    3D flow;    Sphere;    Disc;   

DOI  :  10.1016/j.jcp.2017.01.064

来源: Elsevier

【 摘 要 】

We present a Brinkman penalization method for three-dimensional (3D) flows using particle vortex methods, improving the existing technique by means of an iterative process. We perform simulations to study the impulsively started flow past a sphere at Re = 1000 and normal to a circular disc at Re = 500. The simulation results obtained for the flow past a sphere are found in qualitative good agreement with previously published results obtained using respectively a 3D vortex penalization method and a 3D vortex method combined with an accurate boundary element method. From the results obtained for the flow normal to a circular disc it is found that the iterative method enables the use of a time step that is one order of magnitude larger than required by the standard non iterative Brinkman penalization method. (C) 2017 Elsevier Inc. All rights reserved.

【 授权许可】

Free