A Variational Finite Element Discretization of Compressible Flow
A Variational Finite Element Discretization of Compressible Flow
复制标题
可压缩流的变分有限元离散
DOI:
10.1007/s10208-020-09473-w
复制
发表时间:
2021
影响因子:
3
通讯作者:
Gay-Balmaz, François
中科院分区:
文献类型:
--
作者:
Gawlik, Evan S.;Gay-Balmaz, François
We present a finite element variational integrator for compressible flows. The numerical scheme is derived by discretizing, in a structure-preserving way, the Lie group formulation of fluid dynamics on diffeomorphism groups and the associated variational principles. Given a triangulation on the fluid domain, the discrete group of diffeomorphisms is defined as a certain subgroup of the group of linear isomorphisms of a finite element space of functions. In this setting, discrete vector fields correspond to a certain subspace of the Lie algebra of this group. This subspace is shown to be isomorphic to a Raviart–Thomas finite element space. The resulting finite element discretization corresponds to a weak form of the compressible fluid equation that does not seem to have been used in the finite element literature. It extends previous work done on incompressible flows and at the lowest order on compressible flows. We illustrate the conservation properties of the scheme with some numerical simulations.
登录
查看更多内容
影响因子:
8.9
作者:
Rudiger Brecht;W. Bauer;Alexander Bihlo;F. Gay‐Balmaz;S. MacLachlan
通讯作者:
S. MacLachlan
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
W. Bauer;F. Gay
通讯作者:
F. Gay
影响因子:
2.1
作者:
A. Natale;C. Cotter
通讯作者:
C. Cotter
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--
影响因子:
2.1
作者:
Natale A
通讯作者:
Natale A