The Mathematical Institute, University of Oxford, Eprints Archive

Two-sided a posteriori error bounds for incompressible quasi-Newtonian flows

Berrone, Stefano and Suli, Endre (2006) Two-sided a posteriori error bounds for incompressible quasi-Newtonian flows. Technical Report. Unspecified. (Submitted)

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Abstract

We develop a posteriori upper and lower error bounds for mixed finite element approximations of a general family of steady, viscous, incompressible quasi-Newtonian flows in a bounded Lipschitz domain $\Omega \subset \mathbb{R}^d$; the family includes degenerate models such as the power-law model, as well as non-degenerate ones such as the Carreau model. The unified theoretical framework developed herein yields two-sided residual-based a posteriori bounds which measure the error in the approximation of the velocity in the $\WW^{1,r}(\Omega)$ norm and that of the pressure in the $\LL^{r'}(\Omega)$ norm, $1/r+1/r'=1$.

Item Type:Technical Report (Technical Report)
Subjects:D - G > Fluid mechanics
H - N > Numerical analysis
Research Groups:Numerical Analysis Group
ID Code:1113
Deposited By:Lotti Ekert
Deposited On:11 May 2011 10:57
Last Modified:11 May 2011 10:57

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