We analyse the effect of the "subgrid viscosity" on a finite element discretisation, with piecewise linear elements, of a linear advection-diffusion scalar equation. We point out the importance of a proper tune-up of the viscosity coefficient, and we propose a heuristic method for obtaining reasonable values for it. The extension to more general problems is then hinted in the last section.
Modeling subgrid viscosity for advection-diffusion problems
BREZZI, FRANCO;MARINI, LUISA DONATELLA;
2000-01-01
Abstract
We analyse the effect of the "subgrid viscosity" on a finite element discretisation, with piecewise linear elements, of a linear advection-diffusion scalar equation. We point out the importance of a proper tune-up of the viscosity coefficient, and we propose a heuristic method for obtaining reasonable values for it. The extension to more general problems is then hinted in the last section.File in questo prodotto:
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