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A stable and conservative coupling of the unsteady compressible navier-stokes equations at interfaces using finite difference and finite volume methods
KTH, Skolan för elektroteknik och datavetenskap (EECS), Centra, Parallelldatorcentrum, PDC.ORCID-id: 0000-0002-3859-9480
2018 (Engelska)Ingår i: AIAA Aerospace Sciences Meeting, 2018, American Institute of Aeronautics and Astronautics Inc, AIAA , 2018, nr 210059Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Stable and conservative interface boundary conditions are developed for the unsteady compressible Navier-Stokes equations using finite difference and finite volume methods. The finite difference approach is based on summation-by-part operators and can be made higher order accurate with boundary conditions imposed weakly. The finite volume approach is an edge- and dual grid-based approach for unstructured grids, formally second order accurate in space, with weak boundary conditions as well. Stable and conservative weak boundary conditions are derived for interfaces between finite difference methods, for finite volume methods and for the coupling between the two approaches. The three types of interface boundary conditions are demonstrated for two test cases. Firstly, inviscid vortex propagation with a known analytical solution is considered. The results show expected error decays as the grid is refined for various couplings and spatial accuracy of the finite difference scheme. The second test case involves viscous laminar flow over a cylinder with vortex shedding. Calculations with various coupling and spatial accuracies of the finite difference solver show that the couplings work as expected and that the higher order finite difference schemes provide enhanced vortex propagation.

Ort, förlag, år, upplaga, sidor
American Institute of Aeronautics and Astronautics Inc, AIAA , 2018. nr 210059
Nationell ämneskategori
Beräkningsmatematik
Identifikatorer
URN: urn:nbn:se:kth:diva-225496DOI: 10.2514/6.2018-0597Scopus ID: 2-s2.0-85044411159ISBN: 9781624105241 (tryckt)OAI: oai:DiVA.org:kth-225496DiVA, id: diva2:1195762
Konferens
AIAA Aerospace Sciences Meeting, 2018, Kissimmee, United States, 8 January 2018 through 12 January 2018
Forskningsfinansiär
Swedish e‐Science Research CenterStiftelsen för internationalisering av högre utbildning och forskning (STINT)VINNOVA
Anmärkning

QC 20180406

Tillgänglig från: 2018-04-06 Skapad: 2018-04-06 Senast uppdaterad: 2018-04-06Bibliografiskt granskad

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Gong, Jing

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