A low-Mach approximation computational framework for particle-laden flows subject to radiation

ORAL

Abstract

The three-way coupled physics of radiation, fluid flow, and particle transport forms the dynamical ingredients in various technological and natural systems, such as particle-based solar-thermal systems, clouds, soothing flames, and atmospheric aerosols. Depending on radiation intensity, the density fluctuations in such systems can be up to order of the mean density itself. We present a parameterization of this problem using a simple model considering flow laden with particles with finite momentum relaxation time. We further present a coupled computational algorithm for simulation of flow, particle transport, and heat transfer using low-Mach approximation. Variety of statistics for gas and dispersed phases are investigated to depict the effect of radiation on particle-laden turbulence at different scenarios. The range of applicability of Boussinesq approximation for modeling buoyancy effects will be discussed.

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Authors

  • Hadi Pouransari

    Department of Mechanical Engineering, Stanford University, CTR Stanford

  • Remi Zamansky

    Center for Turbulence Research, CTR - Stanford University, CTR Stanford

  • Ali Mani

    Center for Turbulence Research, Stanford, Stanford University, Center for Turbulence Research, Stanford University, Department of Mechanical Engineering, Stanford University, CTR, Stanford University, CTR - Stanford University, CTR Stanford