Modeling anisotropic Reynolds-stress dissipation in particle- or droplet-laden flows |
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Affiliation: | 1. Department of Applied Mechanics, Chalmers University of Technology, Göteborg SE41296, Sweden;2. Department of Energy and Environment, Chalmers University of Technology, Göteborg SE41296, Sweden;1. Department of Chemical Engineering, University of Kashan, 8731753153 Kashan, Iran;2. Department of Engineering and Architecture, University of Udine, 33100 Udine, Italy;3. Institute of Fluid Mechanics and Heat Transfer, TU Wien, 1060 Wien, Austria |
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Abstract: | Particles or droplets dispersed in turbulent flows at sufficiently high volume loadings lead to modifications of turbulence characteristics. More specifically, in a detailed experimental investigation by Poelma and coworkers, where the particle phase moves with a non-zero mean velocity relative to the fluid phase, it was found that anisotropic Reynolds-stress dissipation is induced. Recently, we have proposed a model that can account for this effect in RANS-based and PDF method simulations. In our previous work, however, no simulation results of the RANS model formulation were presented. In the present work, a new compact tensorial RANS formulation is presented and the new formulation is validated against the experimental data of Poelma and coworkers. |
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Keywords: | Particles Droplets Turbulence modeling Reynolds-stress modeling RANS |
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