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Divergence-Free WENO Reconstruction-Based Finite Volume Scheme for Solving Ideal MHD Equations on Triangular Meshes

Published online by Cambridge University Press:  12 April 2016

Zhiliang Xu*
Affiliation:
Department of Applied and Computational Mathematics and Statistics, University of Notre Dame, Notre Dame, IN 46556, USA
Dinshaw S. Balsara*
Affiliation:
Department of Physics, University of Notre Dame, Notre Dame, IN 46556, USA
Huijing Du
Affiliation:
Department of Mathematics, University of California, Irvine, Irvine, CA 92697, USA
*
*Corresponding author. Email addresses:zxu2@nd.edu (Z. Xu), Dinshaw.S. Balsara.1@nd.edu (D. S. Balsara), huijingd@uci.edu (H. Du)
*Corresponding author. Email addresses:zxu2@nd.edu (Z. Xu), Dinshaw.S. Balsara.1@nd.edu (D. S. Balsara), huijingd@uci.edu (H. Du)
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Abstract

In this paper, we introduce a high-order accurate constrained transport type finite volume method to solve ideal magnetohydrodynamic equations on two-dimensional triangular meshes. A new divergence-free WENO-based reconstruction method is developed to maintain exactly divergence-free evolution of the numerical magnetic field. In this formulation, the normal component of the magnetic field at each face of a triangle is reconstructed uniquely and with the desired order of accuracy. Additionally, a new weighted flux interpolation approach is also developed to compute the z-component of the electric field at vertices of grid cells. We also present numerical examples to demonstrate the accuracy and robustness of the proposed scheme.

Type
Research Article
Copyright
Copyright © Global-Science Press 2016 

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