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首页> 外文期刊>Flow, Turbulence and Combustion >Evaluation of a Modified Reynolds Stress Model for Turbulent Dispersed Two-Phase Flows Including Two-Way Coupling
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Evaluation of a Modified Reynolds Stress Model for Turbulent Dispersed Two-Phase Flows Including Two-Way Coupling

机译：包含两向耦合的湍流分散两相流的修正雷诺应力模型的评估

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摘要

A modified Reynolds stress turbulence model for the pressure rate of strain can be derived for dispersed two-phase flows taking into account gas-particle interaction. The transport equations for the Reynolds stresses as well as the equation for the fluctuating pressure can be derived starting from the multiphase Navier–Stokes equations. The unknown pressure rate of strain correlation in the Reynolds stress equations is then modelled by considering the multiphase equation for the fluctuating pressure. This leads to a multiphase pressure rate of strain model. The extra particle interaction source terms occurring in the model for the pressure rate of strain can be constructed easily, with no noticeable extra computational cost. Eulerian–Lagrangian simulation results of a turbulent dispersed two-phase jet are presented to show the differences in results with and without the new two-way coupling terms.
机译：对于分散的两相流，考虑到气体-颗粒之间的相互作用，可以得出应变压力率的改进的雷诺应力湍流模型。雷诺应力的传递方程以及脉动压力的方程可以从多相Navier–Stokes方程开始。然后，通过考虑波动压力的多相方程，对雷诺应力方程中未知的应变相关压力率进行建模。这导致了应变模型的多相压力速率。在模型中出现的关于应变压力速率的额外粒子相互作用源项可以很容易地构造，而没有明显的额外计算成本。提出了湍流分散的两相射流的欧拉-拉格朗日模拟结果，以显示使用和不使用新的双向耦合项时结果的差异。

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