Nonlinear flows in nearly incompressible hydrodynamic fluids

Details Nonlinear flows in nearly incompressible hydrodynamic fluids Nonlinear flows in nearly incompressible hydrodynamic fluids

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrve..69f6309d&link_type=abstract

Physical Review E, vol. 69, Issue 6, id. 066309

Physics

3

General Subsonic Flows, Solar Wind Plasma, Sources Of Solar Wind

Scientific paper

Nearly incompressible viscous hydrodynamic fluids are investigated using nonlinear fluid simulations. Nearly incompressible fluids possess acoustic modes through high frequency fluctuations associated with the subsonic fluid Mach number. These modes, in combination with the fluid modes, drive linearly unstable modes and nonlinearly excite flows. The nonlinear flows damp the long wavelengths in our simulations, and are dissipated resonantly when certain nonlinear conditions are satisfied. In agreement with our analytic analysis, the nonlinearly saturated flows in nearly incompressible fluids are generated through the action of the Reynolds stress forces.

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