{ "id": "1901.01221", "version": "v1", "published": "2019-01-04T17:25:06.000Z", "updated": "2019-01-04T17:25:06.000Z", "title": "Asymptotic analysis for Vlasov-Fokker-Planck/compressible Navier-Stokes equations with a density-dependent viscosity", "authors": [ "Young-Pil Choi", "Jinwook Jung" ], "categories": [ "math.AP" ], "abstract": "We study a hydrodynamic limit of a system of coupled kinetic and fluid equations under a strong local alignment force and a strong Brownian motion. More precisely, we consider the Vlasov-Fokker-Planck type equation and compressible Navier-Stokes equations with a density-dependent viscosity. Based on a relative entropy argument, by assuming the existence of weak solutions to that kinetic-fluid system, we rigorously derive a two-phase fluid model consisting of isothermal Euler equations and compressible Navier-Stokes equations with a density-dependent viscosity.", "revisions": [ { "version": "v1", "updated": "2019-01-04T17:25:06.000Z" } ], "analyses": { "keywords": [ "density-dependent viscosity", "vlasov-fokker-planck/compressible navier-stokes equations", "asymptotic analysis", "strong local alignment force", "strong brownian motion" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }