Hybrid Unsteady RANS and PDF Method for Turbulent Non-Reactive and Reactive Flows |
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| Authors: | Hai-Wen Ge Min-Ming Zhu Yi-Liang Chen Eva Gutheil |
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| Institution: | 1.Interdisziplin?res Zentrum für Wissenschaftliches Rechnen,Universit?t Heidelberg,Heidelberg,Germany;2.Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei,P.R. China |
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| Abstract: | A hybrid unsteady Reynolds-averaged numerical simulation (U-RANS) and probability density function (PDF) method is developed
for turbulent non-reactive and reactive flows. The resulting modeled equations are solved by a consistent hybrid finite volume
and Lagrangian Monte-Carlo particle method. Both turbulent non-reactive and reactive flows in a rectangular channel containing
a triangular-shaped bluff-body are simulated. One-step and two-step mechanisms for propane/air combustion are used for the
reactive case. The time-averaged results are compared with both experimental data and numerical results from the literature
using large eddy simulation (LES) and steady RANS. The results of the present method are in good agreement with the experimental
data, and they improve the numerical results available in the literature. |
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| Keywords: | Unsteady RANS PDF method Finite volume method Particle method Unstructured meshes Turbulent reactive flow |
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