Global existence of smooth solutions to the k-ε model equations for turbulent flows

In this paper we are concerned with the global existence of smooth solutions to theκ-ε model equations for turbulent flows in ℝ³. The global well-posedness is proved under the condition that the initial data are close to the standard equilibrium state in the H³-framework. The proof relies on energy estimates on velocity, temperature, turbulent kinetic energy, and the rate of viscous dissipation. We use several new techniques to overcome the difficulties from the product of two functions and higher order norms. This is the first result concerning κ-ε model equations.