Direct NumeriSimulations of Penetrative Convection and Generation of Internal Gravity Waves

Details Direct NumeriSimulations of Penetrative Convection and Generation of Internal Gravity Waves Direct NumeriSimulations of Penetrative Convection and Generation of Internal Gravity Waves

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aca....53..321k&link_type=abstract

Acta Astronomica, v.53, pp.321-339, (2003).

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14

Convection, Hydrodynamics, Gravitational Waves

Scientific paper

Two-dimensional, direct numerisimulations are used to investigate how thermal convection excites internal gravity waves in the stable layer beneath a convectively unstable zone. The mechanienergy flux carried downwards by the waves strongly depends on the viscosity coefficient. This flux is compared with the energy flux predicted by a simple parametric model of wave generation applied to two models of convection dynamics: one based on the mixing-length treatment and the other on a convective plume model. Numerisimulations always produce substantially larger energy fluxes than the parametric models. This difference may result from shortcomings of the parametric modeling but also from the fact that our simulations are two-dimensional.

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