Navier–Stokes equations with degenerate viscosity,vacuum and gravitational force |
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| Authors: | Renjun Duan Tong Yang Changjiang Zhu |
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| Institution: | 1. Department of Mathematics, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of ChinaDepartment of Mathematics, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China===;2. Department of Mathematics, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, People's Republic of China;3. Department of Mathematics, Laboratory of Nonlinear Analysis, Central China Normal University, Wuhan 430079, People's Republic of China |
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| Abstract: | The global existence of weak solutions to the compressible Navier–Stokes equations with vacuum attracts many research interests nowadays. For the isentropic gas, the viscosity coefficient depends on density function from physical point of view. When the density function connects to vacuum continuously, the vacuum degeneracy gives some analytic difficulties in proving global existence. In this paper, we consider this case with gravitational force and fixed boundary condition. By giving a series of a priori estimates on the solution coping with the degeneracy of vacuum, gravitational force and boundary effect, we give global existence and uniqueness results similar to the case without force and boundary. Copyright © 2006 John Wiley & Sons, Ltd. |
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| Keywords: | Navier– Stokes equations vacuum a priori estimates global existence |
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