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- W1275493088 abstract "We introduce a mathematical model and related numerical method for numerical modeling of ideal magnetohydrodynamic (MHD) gas flows as an extension of previously known quasi-gasdynamic (QGD) equations. This approach is based on smoothing, or averaging of the original MHD equation system over a small time interval that leads to a new equation system, named quasi-MHD, or QMHD system. The QMHD equations are closely related to the original MHD system except for additional strongly non-linear dissipative τ-terms with a small parameter τ as a factor. The τ-terms depend on the solution itself and decrease in regions with the small space gradients of the solution. In this sense the QMHD system could be regarded as an approach with adaptive artificial dissipation. The QMHD is a generalization of regularized (or quasi-) gas dynamic equation system suggested in last three decades. In the QMHD numerical method the evolution of all physical variables is presented in a non-split divergence form. Divergence-free evolution of the magnetic field provides by using a constrained transport method based on Faraday’s law of induction. Accuracy and convergence of the QMHD method is verified on a wide set of standard MHD tests including the 3D Orszag–Tang vortex flow." @default.
- W1275493088 created "2016-06-24" @default.
- W1275493088 creator A5002679598 @default.
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- W1275493088 date "2015-11-01" @default.
- W1275493088 modified "2023-09-26" @default.
- W1275493088 title "Smoothed MHD equations for numerical simulations of ideal quasi-neutral gas dynamic flows" @default.
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- W1275493088 doi "https://doi.org/10.1016/j.cpc.2015.07.003" @default.
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