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High-order accurate computations for unsteady aerodynamics
2007 (English)In: Computers & Fluids, ISSN 0045-7930, E-ISSN 1879-0747, Vol. 36, no 3, 636-649 p.Article in journal (Refereed) Published
Abstract [en]

A high-order accurate finite difference scheme is used to perform numerical studies on the benefit of high-order methods. The main advantage of the present technique is the possibility to prove stability for the linearized Euler equations on a multi-block domain, including the boundary conditions. The result is a robust high-order scheme for realistic applications. Convergence studies are presented, verifying design order of accuracy and the superior efficiency of high-order methods for applications dominated by wave propagation. Furthermore, numerical computations of a more complex problem, a vortex-airfoil interaction, show that high-order methods are necessary to capture the significant flow features for transient problems and realistic grid resolutions. This methodology is easy to parallelize due to the multi-block capability. Indeed, we show that the speedup of our numerical method scales almost linearly with the number of processors.

Place, publisher, year, edition, pages
2007. Vol. 36, no 3, 636-649 p.
Keyword [en]
finite-difference schemes, boundary-value-problems, convergence rate, shock, approximations, resolution, equations, meshes, flows, euler
Identifiers
URN: urn:nbn:se:kth:diva-16338DOI: 10.1016/j.compfluid.2006.02.004ISI: 000243716200012OAI: oai:DiVA.org:kth-16338DiVA: diva2:334380
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Svärd, Magnus
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