Error Boundedness of Discontinuous Galerkin Methods with Variable Coefficients
Error Boundedness of Discontinuous Galerkin Methods with Variable Coefficients
复制标题
变系数间断伽辽金法的误差有界性
DOI:
10.1007/s10915-018-00902-1
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发表时间:
2019
影响因子:
2.5
通讯作者:
H. Ranocha
中科院分区:
文献类型:
--
作者:
P. Öffner;H. Ranocha
For practical applications, the long time behaviour of the error of numerical solutions to time-dependent partial differential equations is very important. Here, we investigate this topic in the context of hyperbolic conservation laws and flux reconstruction schemes, focusing on the schemes in the discontinuous Galerkin spectral element framework. For linear problems with constant coefficients, it is well-known in the literature that the choice of the numerical flux (e.g. central or upwind) and the selection of the polynomial basis (e.g. Gauß–Legendre or Gauß–Lobatto–Legendre) affects both the growth rate and the asymptotic value of the error. Here, we extend these investigations of the long time error to variable coefficients using both Gauß–Lobatto–Legendre and Gauß–Legendre nodes as well as several numerical fluxes. We derive conditions guaranteeing that the errors are still bounded in time. Furthermore, we analyse the error behaviour under these conditions and demonstrate in several numerical tests similarities to the case of constant coefficients. However, if these conditions are violated, the error shows a completely different behaviour. Indeed, by applying central numerical fluxes, the error increases without upper bound while upwind numerical fluxes can still result in uniformly bounded numerical errors. An explanation for this phenomenon is given, confirming our analytical investigations.
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影响因子:
2.5
作者:
D. Kopriva;G. Gassner
通讯作者:
D. Kopriva;G. Gassner
影响因子:
7.2
作者:
Vincent P
通讯作者:
Vincent P
DOI:
10.1137/060654943
发表时间:
2007
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
J. Nordström
通讯作者:
J. Nordström
影响因子:
1.5
作者:
U. Koley;Siddhartha Mishra;N. Risebro;M. Svärd
通讯作者:
M. Svärd
影响因子:
2.5
作者:
Nordström, J;Gustafsson, R
通讯作者:
Gustafsson, R