“…In particular, the one-dimensional problem has been studied in many papers, for examples, [3,4,7,15,17,22,25] and so on. However, many fundamental problems for MHD are still open.…”
Abstract. The three-dimensional equations of compressible magnetohydrodynamic isentropic flows are considered. An initial-boundary value problem is studied in a bounded domain with large data. The existence and large-time behavior of global weak solutions are established through a three-level approximation, energy estimates, and weak convergence for the adiabatic exponent γ > 3 2 and constant viscosity coefficients.
“…In particular, the one-dimensional problem has been studied in many papers, for examples, [3,4,7,15,17,22,25] and so on. However, many fundamental problems for MHD are still open.…”
Abstract. The three-dimensional equations of compressible magnetohydrodynamic isentropic flows are considered. An initial-boundary value problem is studied in a bounded domain with large data. The existence and large-time behavior of global weak solutions are established through a three-level approximation, energy estimates, and weak convergence for the adiabatic exponent γ > 3 2 and constant viscosity coefficients.
“…We are interested in the well-posedness and regularity of global solutions of the initial-boundary value problem. For perfect gases with small smooth initial data, the existence of global solutions was proved in [15], and the largetime behavior was studied in [25]. For large initial data, these problems have additional difficulties because of the presence of the magnetic field and its interaction with the hydrodynamic motion of the flow of large oscillation.…”
A free boundary problem for nonlinear magnetohydrodynamics with general large initial data is investigated. The existence, uniqueness, and regularity of global solutions are established with large initial data in H 1 : It is shown that neither shock waves nor vacuum and concentration in the solutions are developed in a finite time, although there is a complex interaction between the hydrodynamic and magnetodynamic effects. An existence theorem of global solutions with large discontinuous initial data is also established. # 2002 Elsevier Science (USA)
“…To close the analysis, however, we need the help of the energy estimate for (1.1). The following result is due to Kawashima and Okada [4]. They established the energy estimate for more general case when magnetic field is present, including (1.1) as a special case.…”
Section: Stability Analysismentioning
confidence: 82%
“…The asymptotic shape of s (1.4), is analyzed using the third equation in (1.1)$. In the study of the dissipation of u and p we combine the energy method [4] and the pointwise estimates based on the Green's function. Such an approach was introduced in [6] for dissipative systems.…”
We study the large-time behavior of solutions of the compressible Navier Stokes equations without heat conductivity. Acoustic waves are dissipative due to the viscosity. Entropy waves are nondissipative due to lack of heat conductivity. Thus the system is of composite type, the simplest prototype of this class of nonlinear partial differential equations. We study the nonlinear interactions of waves using a combination of energy method, weighted energy method, and pointwise estimates.
Academic Press
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