EXPLICIT JACOBIAN MATRIX FORMULAS FOR ENTROPY STABLE SUMMATION-BY-PARTS SCHEMES
EXPLICIT JACOBIAN MATRIX FORMULAS FOR ENTROPY STABLE SUMMATION-BY-PARTS SCHEMES
复制标题
熵稳定分部求和方案的显式雅可比矩阵公式
DOI:
10.1007/s00211-020-01158-4
复制
发表时间:
2020
影响因子:
2.1
通讯作者:
Christina G. Taylor
中科院分区:
文献类型:
--
作者:
Jesse Chan;Christina G. Taylor
Entropy stable schemes replicate an entropy inequality at the semi-discrete level. These schemes rely on an algebraic summation-by-parts (SBP) structure and a technique referred to as flux differencing. We provide simple and explicit formulas for Jacobian matrices for the semidiscrete systems of ODEs produced by entropy stable discretizations. These formulas are derived based on the structure of flux differencing and derivatives of flux functions, which can be computed using automatic differentiation (AD). Numerical results demonstrate the efficiency and utility of these Jacobian formulas, which are then used in the context of two-derivative explicit time-stepping schemes and implicit time-stepping.
DOI:
10.1016/j.jcp.2020.109789
发表时间:
2019-09
期刊:
J. Comput. Phys.
影响因子:
--
作者:
Jesse Chan
通讯作者:
Jesse Chan
影响因子:
2.5
作者:
Chan, Jesse
通讯作者:
Chan, Jesse
影响因子:
4.1
作者:
Chan, Jesse
通讯作者:
Chan, Jesse