Modeling subgrid viscosity for advection-diffusion problems

We analyze the effect of the subgrid viscosity on a finite element discretization, 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...

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Veröffentlicht in:	Computer methods in applied mechanics and engineering 2000-12, Vol.190 (13-14), p.1601-1610
Hauptverfasser:	BREZZI, F, HOUSTON, P, MARINI, D, SÜLI, E
Format:	Artikel
Sprache:	eng
Schlagworte:	Computational methods in fluid dynamics Computational techniques Exact sciences and technology Finite-element and galerkin methods Fluid dynamics Fundamental areas of phenomenology (including applications) Mathematical methods in physics Physics
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Zusammenfassung:	We analyze the effect of the subgrid viscosity on a finite element discretization, 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.
ISSN:	0045-7825 1879-2138
DOI:	10.1016/S0045-7825(00)00179-1