Convergence of approximate deconvolution models to the filtered Navier-Stokes Equations

Details Convergence of approximate deconvolution models to the filtered Navier-Stokes Equations Convergence of approximate deconvolution models to the filtered Navier-Stokes Equations

2009-12-21

arxiv.org/abs/0912.4121v1

Mathematics

Analysis of PDEs

Scientific paper

We consider a 3D Approximate Deconvolution Model (ADM) which belongs to the class of Large Eddy Simulation (LES) models. We work with periodic boundary conditions and the filter that is used to average the fluid equations is the Helmholtz one. We prove existence and uniqueness of what we call a "regular weak" solution $(\wit_N,q_N)$ to the model, for any fixed order $N\in\N$ of deconvolution. Then, we prove that the sequence $\{(\wit_N,q_N)\}_{N \in \N}$ converges -in some sense- to a solution of the filtered Navier-Stokes equations, as $N$ goes to infinity. This rigorously shows that the class of ADM models we consider have the most meaningful approximation property for averages of solutions of the Navier-Stokes equations.

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