Adaptive filtering for the lattice Boltzmann method
Article dans une revue avec comité de lecture
In this study, a new selective filtering technique is proposed for the Lattice Boltzmann Method. This technique is based on an adaptive implementation of the selective filter coefficient σ. The proposed model makes the latter coefficient dependent on the shear stress in order to restrict the use of the spatial filtering technique in sheared stress region where numerical instabilities may occur. Different parameters are tested on 2D test-cases sensitive to numerical stability and on a 3D decaying Taylor–Green vortex. The results are compared to the classical static filtering technique and to the use of a standard subgrid-scale model and give significant improvements in particular for low-order filter consistent with the LBM stencil.
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Communication avec acteMARIÉ, Simon; GLOERFELT, Xavier (AIAA, 2015)In this study, a new selective ltering technique is proposed for the Lattice Boltzmann Method. This technique is based on dynamical implementation of the selective filter coefficient . The proposed model makes the latter ...
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Comparison of Subgrid-scale Viscosity Models and Selective Filtering Strategy for Large-eddy Simulations Article dans une revue avec comité de lectureAUBARD, Guillaume; STEFANIN VOLPIANI, Pedro; GLOERFELT, Xavier; ROBINET, Jean-Christophe (Springer Verlag (Germany), 2013)Explicitly filtered large-eddy simulations (LES), combining high-accuracy schemes with the use of a selective filtering without adding an explicit subgrid-scales (SGS) model, are carried out for the Taylor-Green-vortex and ...