FC-based shock-dynamics solver with neural-network localized artificial-viscosity assignment
FC-based shock-dynamics solver with neural-network localized artificial-viscosity assignment
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基于 FC 的冲击动力学求解器,具有神经网络局部人工粘度分配
DOI:
10.1016/j.jcpx.2022.100110
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发表时间:
2022
影响因子:
--
通讯作者:
Leibovici, Daniel V.
中科院分区:
文献类型:
--
作者:
Bruno, Oscar P.;Hesthaven, Jan S.;Leibovici, Daniel V.
This paper presents a spectral scheme for the numerical solution of nonlinear conservation laws innon-periodic domains under arbitrary boundary conditions. The approach relies on the use of the Fourier Continuation (FC) method for spectral representation of non-periodic functions in conjunction with smooth localized artificial viscosity assignments produced by means of a Shock-Detecting Neural Network (SDNN). Like previous shock capturing schemes and artificial viscosity techniques, the combined FC-SDNN strategy effectively controls spurious oscillations in the proximity of discontinuities. Thanks to its use of alocalized but smooth artificial viscosity term, whose support is restricted to a vicinity of flow-discontinuity points, the algorithm enjoys spectral accuracy and low dissipation away from flow discontinuities, and, in such regions, it produces smooth numerical solutions—as evidenced by an essential absence of spurious oscillations in level set lines. The FC-SDNN viscosity assignment, which does not require use of problem-dependent algorithmic parameters, induces a significantly lower overall dissipation than other methods, including the Fourier-spectral versions of the previous entropy viscosity method. The character of the proposed algorithm is illustrated with a variety of numerical results for the linear advection, Burgers and Euler equations in one and two-dimensional non-periodic spatial domains.
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DOI:
10.1137/s1064827594273948
发表时间:
1997-09
期刊:
SIAM J. Sci. Comput.
影响因子:
--
作者:
D. Pathria
通讯作者:
D. Pathria
DOI:
10.1016/j.jcp.2019.02.033
发表时间:
2019-08
期刊:
J. Comput. Phys.
影响因子:
--
作者:
O. Bruno;Max Cubillos;Edwin Jimenez
通讯作者:
O. Bruno;Max Cubillos;Edwin Jimenez
DOI:
10.1016/j.jcp.2011.08.024
发表时间:
2011-10
期刊:
J. Comput. Phys.
影响因子:
--
作者:
Khosro Shahbazi;Nathan Albin;O. Bruno;J. Hesthaven
通讯作者:
Khosro Shahbazi;Nathan Albin;O. Bruno;J. Hesthaven
影响因子:
2.5
作者:
Adeline Kornelus;D. Appelö
通讯作者:
Adeline Kornelus;D. Appelö
DOI:
10.1016/j.jcp.2019.06.023
发表时间:
2019-10
期刊:
J. Comput. Phys.
影响因子:
--
作者:
A. Mazaheri;Chi-Wang Shu;V. Perrier
通讯作者:
A. Mazaheri;Chi-Wang Shu;V. Perrier