Formulation of subgrid stresses for large-scale fluid equations.
A formulation is presented based on a previously derived self-consistent procedure for obtaining subgrid scale models for complex system of equations. Using linear stability analysis and numerical simulations of the one-dimensional Burgers equation the formulation is shown to be very stable numerically and to reproduce accurately the large-scale flow of a high-resolution, direct simulation. Moreover, the resulting equation has a structure very similar to the viscous Camassa-Holm equation recently introduced in the modeling of turbulent flows.
Minotti
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Departamento de Física, Instituto de Física del Plasma, INFIP-CONICET, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina.
Dasso
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