Existence and uniqueness of solutions for a degenerate quasilinear parabolic problem

• Autores: Maurizio Badii
• Localización: Publicacions matematiques, ISSN 0214-1493, Vol. 38, Nº 2, 1994, págs. 327-352
• Idioma: inglés
• Títulos paralelos:
  • Existencia y unicidad de soluciones para un problema parabólico casi lineal degenerado
• Enlaces
  • Texto completo
• Resumen

  • We consider the following quasilinear parabolic equation of degenerate type with convection term $u_t=\varphi (u)_{xx}+b(u)_x$ in $(-L,0)\times (0,T)$. We solve the associate initial-boundary data problem, with nonlinear flux conditions. This problem, describes the evaporation of an incompressible fluid from a homogeneous porous media. The nonlinear condition in $x=0$, means that the flow of fluid leaving the porous media depends on variable meteorological conditions and in a nonlinear manner on $u$. In $x=-L$, we have an impervious boundary. For a sufficiently smooth initial data, one proves the existence and uniqueness of the global strong solution in the class of bounded variation functions.