Submetido para TEMA Existence and Uniqueness of Solutions of a Nonlinear Heat Equation

Abstract. A nonlinear partial differential equation of the following form is con-sidered: u ′ − div a(u)∇u + b(u) |∇u|2 = 0, which arises from the heat conduction problems with strong temperature-dependent material parameters, such as mass density, specific heat and heat conductivity. Existence, uniqueness and asymptotic behavior of initial boundary value problems under appropriate assumptions on the material parameters are established. 1