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Micromixing models for turbulent flows

机译:用于湍流的微混合模型

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摘要

In transported probability density function and filtered density function methods, micromixing models are required to close the molecular mixing term. The accuracy and computational efficiency of improved versions of the parameterized scalar profile (PSP) model are assessed and compared with commonly used mixing models such as Curl, modified Curl, interaction by exchange with the mean and Euclidean minimum spanning tree. Different generalizations of the PSP mixing model for spatially inhomogeneous flow Configurations are presented. The selected test cases focus On molecular mixing and avoid interference with other models. Simulation results for a three-Stream problem, involving two inert scalars, and a multi-scalar test case with mean-scalar-gradients are presented. (C) 2008 Elsevier Inc. All rights reserved.
机译:在运输概率密度函数和滤波密度函数方法中,需要使用微混合模型来封闭分子混合项。评估了参数化标量轮廓(PSP)模型改进版本的准确性和计算效率,并将其与常用的混合模型(例如Curl,修改后的Curl,通过与均值交换和欧几里德最小生成树进行交互)进行比较。提出了针对空间非均匀流动配置的PSP混合模型的不同概括。选择的测试用例侧重于分子混合,并避免与其他模型干扰。给出了包含两个惰性标量的三流问题的仿真结果,以及具有平均标量梯度的多标量测试案例。 (C)2008 Elsevier Inc.保留所有权利。

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