混相流体混合与脱混的多组分湍流模型

IF 1.5 4区工程技术 Q3 MECHANICS

Journal of Turbulence Pub Date : 2021-10-15 DOI:10.1080/14685248.2021.1983180

N. Braun, R. Gore

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引用次数: 5

摘要

提出了一种可压缩变密度流湍流的解混模型。该模型基于Besnard-Harlow-Rauenzahn (BHR)模型族(Besnard D, Harlow F, Rauenzahn R, et al.)。变密度湍流输运方程及其与双场模型的关系。NM(美国):洛斯阿拉莫斯国家实验室;1992年(技术报告LA-12303-MS)，但扩展到跟踪每个存在物种的湍流通量和物质质量分数波动的演变。新的演化方程的引入不需要额外的闭包或相对于以前的BHR模型的新的经验调整系数，并且被证明可以提高模型重现包含由稳定力约束的混合层的模拟行为的能力。该模型在一系列典型流动中进行了测试，包括瑞利-泰勒驱动、激波驱动和剪切驱动的湍流，结果表明，在这些情况下，该模型与模拟和实验结果相当吻合。

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A multispecies turbulence model for the mixing and de-mixing of miscible fluids

A de-mix capable model for turbulence in compressible, variable density flows is proposed. The model is based on the Besnard-Harlow-Rauenzahn (BHR) family of models (Besnard D, Harlow F, Rauenzahn R, et al. Turbulence transport equations for variable-density turbulence and their relationship to two-field models. NM (United States): Los Alamos National Laboratory; 1992 (Technical Report LA-12303-MS), but is extended to track the evolution of the turbulent fluxes and fluctuations in the material mass fractions for each species present. The new evolution equations are introduced without requiring additional closures or new empirically tuned coefficients relative to previous BHR models, and are shown to improve the model’s ability to reproduce the behaviour of simulations containing mixing layers that are constrained by a stabilising force. The model is tested in a range of canonical flows including Rayleigh-Taylor driven, shock driven, and shear driven turbulence, and is shown to produce reasonable agreement with simulations and experiments in these scenarios.

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来源期刊

Journal of Turbulence 物理-力学

CiteScore

3.90

自引率

5.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Turbulence is a physical phenomenon occurring in most fluid flows, and is a major research topic at the cutting edge of science and technology. Journal of Turbulence ( JoT) is a digital forum for disseminating new theoretical, numerical and experimental knowledge aimed at understanding, predicting and controlling fluid turbulence. JoT provides a common venue for communicating advances of fundamental and applied character across the many disciplines in which turbulence plays a vital role. Examples include turbulence arising in engineering fluid dynamics (aerodynamics and hydrodynamics, particulate and multi-phase flows, acoustics, hydraulics, combustion, aeroelasticity, transitional flows, turbo-machinery, heat transfer), geophysical fluid dynamics (environmental flows, oceanography, meteorology), in physics (magnetohydrodynamics and fusion, astrophysics, cryogenic and quantum fluids), and mathematics (turbulence from PDE’s, model systems). The multimedia capabilities offered by this electronic journal (including free colour images and video movies), provide a unique opportunity for disseminating turbulence research in visually impressive ways.