Discrete Adjoint Computations for Relaxation Runge–Kutta Methods
Discrete Adjoint Computations for Relaxation Runge–Kutta Methods
复制标题
松弛龙格 - 库塔方法的离散伴随计算
DOI:
10.1007/s10915-023-02102-y
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发表时间:
2023
影响因子:
2.5
通讯作者:
Chan, Jesse
中科院分区:
文献类型:
--
作者:
Bencomo, Mario J.;Chan, Jesse
Relaxation Runge–Kutta methods reproduce a fully discrete dissipation (or conservation) of entropy for entropy stable semi-discretizations of nonlinear conservation laws. In this paper we derive the discrete adjoint of relaxation Runge–Kutta schemes, which are applicable to discretize-then-optimize approaches for optimal control problems. Furthermore, we prove that the derived discrete relaxation Runge–Kutta adjoint preserves time-symmetry when applied to linear skew-symmetric systems of ODEs. Numerical experiments verify these theoretical results while demonstrating the importance of appropriately treating the relaxation parameter when computing the discrete adjoint.
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