Diffusive Relaxation Limit of the Multi-Dimensional Hyperbolic Jin-Xin System
26 Pages Posted: 26 Sep 2022
In this paper we study the diffusive relaxation limit of the Jin-Xin system toward viscous conservation laws in the multi-dimensional setting. For initial data being small perturbations of a constant state in suitable homogeneous Besov norms, we prove the global well-posedness of strong solutions satisfying the uniform estimates with respect to the relaxation parameter. Then, we justify the strong relaxation limit and exhibit an explicit convergence rate of the process. Our proof is based on an adaptation of the techniques developed in [10, 11] to be able to deal with the additional low-order nonlinear term.
Keywords: Jin-Xin approximation, relaxation limit, global well-posedness, Besov, Viscous conservation laws
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