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Chinese Journal of Space Science ›› 2015, Vol. 35 ›› Issue (4): 393-402.doi: 10.11728/cjss2015.04.393

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Comparative Study of Three AUSM Algorithms and Simulated Application on the Solar Wind

WANG Tao, LI Huichao, ZHANG Man, FU Huazheng   

  1. State Key Laboratory of Space Weather National Space Science Center, Chinese Academy of Sciences, Beijing 100190
    University of Chinese Academy of Sciences, Beijing 100049
  • Received:2014-05-14 Revised:2014-09-16 Online:2015-06-15 Published:2015-06-30

Abstract:

Numerical simulation of MHD (Magnetohydrodynamics) is an important method to study solar-terrestrial physics phenomena. In this paper, three AUSM algorithms, i.e., AUSM, AUSM+, AUSMPW+, were compared in conjunction with the HDC method to eliminate the divergence of the magnetic field. The AUSM+ algorithm is found to be better than the AUSM algorithm and the AUSMPW+ algorithm through the results of Rotor example and Orszag-Tang vortex example. Further, the AUSM+ algorithm is used to simulate the coronal with a six-component grid system. The results show that this algorithm can correctly calculate the large-scale structure of the corona. Also, the HDC method can maintain the divergence-free constraint on the magnetic field.

Key words: AUSM algorithms, HDC method, Simulation of corona

CLC Number: