Enabling numerical accuracy of Navier-Stokes- through deconvolution and enhanced stability
Carolina C. Manica, Monika Neda, Maxim Olshanskii, Leo G. Rebholz (2011)
ESAIM: Mathematical Modelling and Numerical Analysis
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We propose and analyze a finite element method for approximating solutions to the Navier-Stokes-alpha model (NS-) that utilizes approximate deconvolution and a modified grad-div stabilization and greatly improves accuracy in simulations. Standard finite element schemes for NS- suffer from two major sources of error if their solutions are considered approximations to true fluid flow: (1) the consistency error arising from filtering; and (2) the dramatic effect of the large pressure error on...