A high‐order discontinuous Galerkin method for compressible flows with immersed boundaries
A high‐order discontinuous Galerkin method for compressible flows with immersed boundaries
复制标题
具有浸没边界的可压缩流的高阶间断伽辽金法
DOI:
10.1002/nme.5343
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发表时间:
2017
影响因子:
2.9
通讯作者:
Oberlack
中科院分区:
文献类型:
--
作者:
Müller;Krämer-Eis;Kummer;Oberlack
We present a higher order discretization scheme for the compressible Euler and Navier–Stokes equations with immersed boundaries. Our approach makes use of a discontinuous Galerkin discretization in a domain that is implicitly defined by means of a level set function. The zero iso‐contour of this level set function is considered as an additional domain boundary where we weakly enforce boundary conditions in the same manner as in boundary‐fitted cells. In order to retain the full order of convergence of the scheme, it is crucial to perform volume and surface integrals in boundary cells with high accuracy. This is achieved using a linear moment‐fitting strategy. Moreover, we apply a non‐intrusive cell‐agglomeration technique that averts problems with very small and ill‐shaped cuts. The robustness, accuracy, and convergence properties of the scheme are assessed in several two‐dimensional test cases for the steady compressible Euler and Navier–Stokes equations. Approximation orders range from 0 to 4, even though the approach directly generalizes to even higher orders. In all test cases with a sufficiently smooth solution, the experimental order of convergence matches the expected rate for discontinuous Galerkin schemes. Copyright © 2016 John Wiley & Sons, Ltd.
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影响因子:
2.9
作者:
G. Brandstetter;S. Govindjee
通讯作者:
S. Govindjee
影响因子:
2.9
作者:
F. Kummer
通讯作者:
F. Kummer
DOI:
10.1016/j.cma.2013.01.007
发表时间:
2013-05
影响因子:
7.2
作者:
Y. Sudhakar;W. Wall
通讯作者:
Y. Sudhakar;W. Wall
DOI:
10.1016/j.jcp.2009.02.021
发表时间:
2009
期刊:
J. Comput. Phys.
影响因子:
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作者:
F. Bassi;C. D. Bartolo;R. Hartmann;A. Nigro
通讯作者:
A. Nigro
DOI:
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发表时间:
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期刊:
影响因子:
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