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Communication Dans Un Congrès Année : 2022

On the effect of turbulence models in the numerical simulation of bubbly flows in rectangular cross channels

Résumé

A promising approach for the numerical simulation of bubbly flows relies on Transport Equations for the Interfacial Area concentration (IATE). These equations include source terms which strongly depend on the turbulence model used to simulate the dynamics of the liquid phase. Authors have shown that the k-eps model is effective in reproducing the bubbly flow in simple channels. However, in more complex configurations like the two phase flow across a tube bundle, this model yields stagnation point anomalies which affect the interaction between the tubes and the fluid. To correctly reproduce this interaction, it is thus necessary to assess the capabilities of more advanced turbulence models. With this goal in mind, we first study the behaviour of the SSG and EBRSM turbulence models and then the contribution on motion of bubble induced turbulence in the simulation of 3D bubbly flows in rectangular cross-channels. A comparison against experimental data is proposed for two channel configurations : a narrow rectangular channel and a large diameter square channel. Our simulations, performed with NETPUNE_CFD, show that among the tested models, the Elliptic Blending Reynolds Stress turbulence model (EBRSM), coupled with a wall force and bubble induced turbulence, is the best one to reproduce the experimental results from the literature.
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Dates et versions

cea-04488806 , version 1 (04-03-2024)

Identifiants

  • HAL Id : cea-04488806 , version 1

Citer

Clément Bazin, Maria Giovanna Rodio, Romain Lagrange, Christophe Josserand. On the effect of turbulence models in the numerical simulation of bubbly flows in rectangular cross channels. EFMC14 – 14th European Fluid Mechanics Conference, Sep 2022, Athènes, Greece. ⟨cea-04488806⟩
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