Dynamic Models for the Subgrid-Scale Mixing of Reactants in Atmospheric Turbulent Reacting Flows Export

@article{citeulike:2770601, abstract = {The effects of the subgrid scales on chemical transformations in large-eddy simulations of the convective atmospheric boundary layer (CBL) are investigated. Dynamic similarity subgrid-scale models are formulated and used to calculate the subgrid-scale covariance. The dynamic procedure allows for simulations free of parameter tuning since the model coefficients are computed based on the resolved reactant concentrations. A scale-dependent procedure is proposed that allows relaxing the assumption of scale invariance used in the dynamic similarity model. Simulation results show that both models are able to account in part for the effect of the segregation of the scalars at the subgrid scales, considerably reducing the resolution dependence of the results found when no subgrid covariance model is used. The scale-dependent dynamic version yields better results than its scale-invariant counterpart.}, author = {Vinuesa, Jean-Fran\&\#231;ois and Port\&\#233;-Agel, Fernando}, citeulike-article-id = {2770601}, citeulike-linkout-0 = {http://dx.doi.org/10.1175/2007JAS2392.1}, day = {1}, doi = {10.1175/2007JAS2392.1}, journal = {Journal of the Atmospheric Sciences}, keywords = {abl, micromixing, subgrid-scale, turbulence}, month = {May}, number = {5}, pages = {1692--1699}, posted-at = {2008-05-08 11:23:22}, priority = {0}, title = {Dynamic Models for the Subgrid-Scale Mixing of Reactants in Atmospheric Turbulent Reacting Flows}, url = {http://dx.doi.org/10.1175/2007JAS2392.1}, volume = {65}, year = {2008} }

TY - JOUR ID - citeulike:2770601 L3 - citeulike-article-id:2770601 N2 - The effects of the subgrid scales on chemical transformations in large-eddy simulations of the convective atmospheric boundary layer (CBL) are investigated. Dynamic similarity subgrid-scale models are formulated and used to calculate the subgrid-scale covariance. The dynamic procedure allows for simulations free of parameter tuning since the model coefficients are computed based on the resolved reactant concentrations. A scale-dependent procedure is proposed that allows relaxing the assumption of scale invariance used in the dynamic similarity model. Simulation results show that both models are able to account in part for the effect of the segregation of the scalars at the subgrid scales, considerably reducing the resolution dependence of the results found when no subgrid covariance model is used. The scale-dependent dynamic version yields better results than its scale-invariant counterpart. IS - 5 JF - Journal of the Atmospheric Sciences EP - 1699 TI - Dynamic Models for the Subgrid-Scale Mixing of Reactants in Atmospheric Turbulent Reacting Flows VL - 65 SP - 1692 KW - abl KW - micromixing KW - subgrid-scale KW - turbulence AU - Vinuesa, Jean-François AU - Porté-Agel, Fernando PY - 2008/05/01/ UR - http://dx.doi.org/10.1175/2007JAS2392.1 ER -