Affiliation of Author(s):航空学院

Journal:INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS

Key Words:Compressible viscous flow hybrid Cartesian grid donor cell method moving shock wave conservation

Abstract:A hybrid Cartesian-based body-fitted adaptive grid method for compressible Navier-Stokes equations is implemented and investigated. In this method, the body-fitted structured grids are generated around the geometries, and the left regions are filled with Cartesian grids. To transfer the data between the different grids, the donor cell searching technique is adopted. An unstructured data-based finite volume update procedure is used, and least squares method is suggested to retain the second order in the overlap region. The moving shock waves with different speeds and vortex passing through the interfaces of the hybrid Cartesian grid are used to explore the accuracy and conservation. A new technique is presented to deal with the non-physical stagnation of slowly moving shock wave around the interface of grid. Numerical examples are presented to demonstrate the results. The three-dimensional extension has also been shown by a benchmark problem.

ISSN No.:1061-8562

Translation or Not:no

Date of Publication:2018-01-01

Co-author:Gan, Yuxin,Liu, Jianming,Shen, Zhiwei

Correspondence Author:赵宁