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

作者：Spietz Henrik Juul; Hejlesen Mads Molholm; Walther Jens Honore^*

来源：Journal of Computational Physics, 2017, 336: 261-274.

DOI：10.1016/j.jcp.2017.01.064

• Vortex method
• Brinkman penalization
• 3D flow
• Sphere
• Disc

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.

• 出版日期2017-5-1