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Indexed by:期刊论文

Date of Publication:2017-09-15

Journal:JOURNAL OF COMPUTATIONAL PHYSICS

Included Journals:SCIE、Scopus

Volume:345

Page Number:866-882

ISSN No.:0021-9991

Key Words:Shock-fitting; Unstructured dynamic grid; Shock wave; Numerical simulation

Abstract:In this work, the shock-fitting technique is further developed on unstructured dynamic meshes. The shock wave is fitted and regarded as a special boundary, whose boundary conditions and boundary speed (shock speed) are determined by solving Rankine-Hugoniot relations. The fitted shock splits the entire computational region into subregions, in which the flows are free from shocks and flow states are solved by a shock-capturing code based on arbitrary Lagrangian-Eulerian algorithm. Along with the motion of the fitted shock, an unstructured dynamic meshes algorithm is used to update the internal node's position to maintain the high quality of computational meshes. The successful applications prove the present shock-fitting to be a valid technique. (C) 2017 Elsevier Inc. All rights reserved.