A Variational Multiscale Method for Particle Dispersion Modeling in the Atmosphere  

作　　者：Y.Nishio B.Janssens K.Limam J.van Beeck 

机构地区：[1]Royal Military Academy(RMA),Brussels,1000,Belgium [2]Universite de La Rochelle(ULR),La Rochelle,17000,France [3]Von Karman Institute for Fluid Dynamics(VKI),Sint-Genesius-Rode,1640,Belgium

出　　处：《Fluid Dynamics & Materials Processing》2023年第3期743-753,共11页流体力学与材料加工（英文）

基　　金：The authors received the funding of the Royal Higher Institute for Defence(MSP16-06).

摘　　要：A LES model is proposed to predict the dispersion of particles in the atmosphere in the context of Chemical,Biological,Radiological and Nuclear(CBRN)applications.The code relies on the Finite Element Method(FEM)for both the fluid and the dispersed solid phases.Starting from the Navier-Stokes equations and a general description of the FEM strategy,the Streamline Upwind Petrov-Galerkin(SUPG)method is formulated putting some emphasis on the related assembly matrix and stabilization coefficients.Then,the Variational Multiscale Method(VMS)is presented together with a detailed illustration of its algorithm and hierarchy of computational steps.It is demonstrated that the VMS can be considered as a more general version of the SUPG method.The final part of the work is used to assess the reliability of the implemented predictor/multicorrector solution strategy.

关 键 词：ABL(Atmospheric boundary layer) CFD FEM LES SUPG(Streamline upwind petrov–Galerkin) Turbulent flow VMS(Variational MultiScale method) 

分 类 号：X513[环境科学与工程—环境工程]