A remark on smooth solutions of the weakly compressible periodic Navier-Stokes equations. (English) Zbl 0997.35050

The author studies periodic solutions of the weakly compressible Navier-Stokes equations for small Mach numbers. The main results of the paper are:
(i) If the initial velocity satisfies a smallness condition in terms of the viscosity, then the system has a smooth solution for all \(T > 0.\)
(ii) As the Mach number tends to zero, the solution of the compressible system approaches the solution of the incompressible Navier-Stokes equations plus a term which represents the fast waves.


35Q30 Navier-Stokes equations
76N10 Existence, uniqueness, and regularity theory for compressible fluids and gas dynamics
35B10 Periodic solutions to PDEs
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