Global well-posedness of the viscous Boussinesq equations

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On uniqueness of positive entire solutions and other properties of linear parabolic equations

January 2005, 12(1): 1-12. doi: 10.3934/dcds.2005.12.1

Global well-posedness of the viscous Boussinesq equations

1.	Department of Applied and Computational Mathematics, California Institute of Technology, Pasadena, CA 91125, United States
2.	Department of Applied Mathematics, University of Colorado at Boulder, Boulder, CO 80309-0524

Received November 2004 Revised November 2004 Published December 2004

Abstract
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We prove the global well-posedness of the viscous incompressible Boussinesq equations in two spatial dimensions for general initial data in $H^m$ with $m\ge 3$. It is known that when both the velocity and the density equations have finite positive viscosity, the Boussinesq system does not develop finite time singularities. We consider here the challenging case when viscosity enters only in the velocity equation, but there is no viscosity in the density equation. Using sharp and delicate energy estimates, we prove global existence and strong regularity of this viscous Boussinesq system for general initial data in $H^m$ with $m \ge 3$.

Keywords: Boussinesq equations, vortex stretching, fluid mechannics., global existence.

Mathematics Subject Classification: 76B03, 76D03, 76D05, 35M1.

Citation: Thomas Y. Hou, Congming Li. Global well-posedness of the viscous Boussinesq equations. Discrete & Continuous Dynamical Systems - A, 2005, 12 (1) : 1-12. doi: 10.3934/dcds.2005.12.1

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