Mimetic properties of difference operators: product and chain rules as for functions of bounded variation and entropy stability of second derivatives
Mimetic properties of difference operators: product and chain rules as for functions of bounded variation and entropy stability of second derivatives
复制标题
差分算子的拟态性质:二阶导数的有界变分函数和熵稳定性的乘积规则和链规则
DOI:
10.1007/s10543-018-0736-7
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发表时间:
2018
影响因子:
1.5
通讯作者:
H. Ranocha
中科院分区:
文献类型:
--
作者:
H. Ranocha
For discretisations of hyperbolic conservation laws, mimicking properties of operators or solutions at the continuous (differential equation) level discretely has resulted in several successful methods. While well-posedness for nonlinear systems in several space dimensions is an open problem, mimetic properties such as summation-by-parts as discrete analogue of integration-by-parts allow a direct transfer of some results and their proofs, e.g. stability for linear systems. In this article, discrete analogues of the generalised product and chain rules that apply to functions of bounded variation are considered. It is shown that such analogues hold for certain second order operators but are not possible for higher order approximations. Furthermore, entropy dissipation by second derivatives with varying coefficients is investigated, showing again the far stronger mimetic properties of second order approximations compared to higher order ones.
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影响因子:
0.7
作者:
Krupa, Sam G.;Vasseur, Alexis F.
通讯作者:
Vasseur, Alexis F.
影响因子:
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DOI:
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2012
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DOI:
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期刊:
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