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Início - ICHMT DL Ano atual Arquivos Comitê executivo Centro Internacional para Transferência de Calor e Massa

Joint Gas-Phase Velocity-Scalar PDF Modeling of Turbulent Evaporating Spray Flows

DOI: 10.1615/ICHMT.2012.ProcSevIntSympTurbHeatTransfPal.2100
pages 2043-2051

Y. Hu
Interdisciplinary Center for Scientific Computing, Heidelberg University, Im Neuenheimer Feld 368, 69120 Heidelberg, Germany

H.-W. Ge
Interdisciplinary Center for Scientific Computing, Heidelberg University, Im Neuenheimer Feld 368, 69120 Heidelberg, Germany

Eva Gutheil
Interdisciplinary Center for Scientific Computing, Heidelberg University, Heidelberg, 69120, Germany

Resumo

The joint gas-phase velocity-mixture fraction probability density function (PDF) transport equation for turbulent spray flows is derived and modeled. The gas-phase simplified Langevin model and interaction-by-exchange-with-the-mean (IEM) model are extended to account for spray evaporation, and they close the joint PDF transport equation, which is solved by a Lagrangian Monte-Carlo particle method. The droplet characteristics including heating, vaporization, and motion are solved by a Lagrangian droplet parcel method using the point-source approximation. A steady, two-dimensional, axi-symmetric, turbulent methanol/air dilute non-reacting spray flow without swirl is simulated. The results of the gas velocity obtained by the PDF method are in good agreement with experimental data, the PDF method improves the results compared to the moment closure modeling.

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