Dynamic nonlinear algebraic models with scale-similarity dynamic procedure for large-eddy simulation of turbulence
نویسندگان
چکیده
Abstract A dynamic nonlinear algebraic model with scale-similarity procedure (DNAM-SSD) is proposed for subgrid-scale (SGS) stress in large-eddy simulation of turbulence. The coefficients the DNAM-SSD are adaptively calculated through relation, which greatly simplifies conventional Germano-identity based (GID). a priori study shows that predicts SGS considerably better than velocity gradient (VGM), Smagorinsky (DSM), mixed (DMM) and DNAM-GID at variety filter widths ranging from inertial to viscous ranges. correlation predicted by can be larger 95% relative errors lower 30%. In posteriori testings LES, outperforms implicit LES (ILES), DSM, DMM models without increasing computational costs, only takes up half time model. accurately plenty turbulent statistics instantaneous spatial structures reasonable agreement filtered DNS data. These results indicate current attractive development highly accurate
منابع مشابه
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ژورنال
عنوان ژورنال: Advances in Aerodynamics
سال: 2022
ISSN: ['2524-6992']
DOI: https://doi.org/10.1186/s42774-022-00107-z