Approximations to Isentropic Planar Magneto-Hydrodynamics Equations by Relaxed Euler-Type Systems
Yachun Li , Zhaoyang Shang , Chenmu Wang , Liang Zhao
Chinese Annals of Mathematics, Series B ›› 2024, Vol. 45 ›› Issue (3) : 413 -440.
Approximations to Isentropic Planar Magneto-Hydrodynamics Equations by Relaxed Euler-Type Systems
In this paper, the authors consider an approximation to the isentropic planar Magneto-hydrodynamics (MHD for short) equations by a kind of relaxed Euler-type system. The approximation is based on the generalization of the Maxwell law for non-Newtonian fluids together with the Maxwell correction for the Ampère law, hence the approximate system becomes a first-order quasilinear symmetrizable hyperbolic systems with partial dissipation. They establish the global-in-time smooth solutions to the approximate Euler-type equations in a small neighbourhood of constant equilibrium states and obtain the global-in-time convergence towards the isentropic planar MHD equations. In addition, they also establish the global-in-time error estimates of the limit based on stream function techniques and energy estimates for error variables.
Planar MHD equations / Relaxation limits / Global convergence / Stream function
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