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

2009/12/21 by Luigi C. Berselli, Berselli, Luigi C., Roger Lewandowski +1
Economics, Econometrics and Finance · Engineering · Mathematics · #Computational Fluid Dynamics and Aerodynamics #Fluid Dynamics and Turbulent Flows #Stochastic processes and financial applications #math.AP #msc:35Q30 #msc:76D03 #msc:76D0376D05 #msc:76D05 #msc:76F65

paper · pdf · doi:10.48550/arxiv.0912.4121

arxiv created 2009/12/21 · arxiv updated 2010/01/14

Abstract

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∈\N of deconvolution. Then, we prove that the sequence \(\wit_N,q_N)\_{N ∈ \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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