IMECH-IR  > 力学所知识产出(1956-2008)
Eulerian Mapping Closure Approach for Probability Density Function of Concentration in Shear Flows
He GW(何国威); Bushnell DM
2002
Source Publication何国威; Bushnell DM.Eulerian Mapping Closure Approach for Probability Density Function of Concentration in Shear Flows :2002.
Abstract
The Eulerian mapping closure approach is developed for uncertainty propagation in computational fluid mechanics. The approach is used to study the Probability Density Function (PDF) for the concentration of species advected by a random shear flow. An analytical argument shows that fluctuation of the concentration field at one point in space is non-Gaussian and exhibits stretched exponential form. An Eulerian mapping approach provides an appropriate approximation to both convection and diffusion terms and leads to a closed mapping equation. The results obtained describe the evolution of the initial Gaussian field, which is in agreement with direct numerical simulations.
Document Type研究报告
Identifierhttp://dspace.imech.ac.cn/handle/311007/44604
Collection力学所知识产出(1956-2008)
Recommended Citation
GB/T 7714
He GW,Bushnell DM. Eulerian Mapping Closure Approach for Probability Density Function of Concentration in Shear Flows. 2002.
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