A 3D cell-centered Lagrangian scheme for the ideal Magnetohydrodynamics equations on unstructured meshes
A 3D cell-centered Lagrangian scheme for the ideal Magnetohydrodynamics equations on unstructured meshes
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非结构化网格上理想磁流体动力学方程的 3D 以单元为中心的拉格朗日方案
DOI:
10.1016/j.cma.2018.08.022
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发表时间:
2018-12
期刊:
影响因子:
--
通讯作者:
Zhiming Gao
中科院分区:
文献类型:
--
作者:
Xiao Xu;Zihuan Dai;Zhiming Gao
We propose a cell-centered Lagrangian numerical scheme for solving the 3D ideal Magnetohydrodynamics (MHD) equations on unstructured meshes. All the variables are cell-centered and the Lagrangian conservative system of ideal MHD equations is compatibly discretized in this scheme. The geometric conservation law (GCL) requirement is satisfied by using the discrete compatible Lagrangian framework of polyhedral meshes. A nodal solver for MHD equations is then constructed through the nodal pressure flux and magnetic field invoking total energy conservation and thermodynamic consistency. Besides, the magnetic divergence free constraint is fulfilled by a projection method after each time step. Various numerical tests are presented to assert the robustness and accuracy of our scheme.
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