An Analysis of CFD-DEM with Coarse Graining for Turbulent Particle-Laden Jet Flows

نویسندگان

چکیده

This paper presents the results of simulations particle-laden air–solid jet flow in long straight tubes using CFD-DEM, along with an analysis coarse-graining. Although previous studies have used CFD-DEM for similar flows, these typically been a dilute regime where uncoupled can be effectively. However, fully coupled introduce issues, necessitating validation to ensure that all coupling parameters are effectively and physics is accurately represented. validated against two different experimental studies, fluid Reynolds numbers between 10,000 40,000 Stokes 5.6 50. Interestingly, profiles mean particle velocity exhibited fewer discrepancies as number increased, but more root-mean-squared compared experiments. The flux was consistent experiments after nozzle exit. Coarse-graining also applied same simulations, achieving relatively accurate results. expected, scaling contact collision frequencies, forces, stresses could not achieved, meaning coarse-graining may useful comparing designs or operating on industrial scale, falls short when measuring total energy dissipation one experiment.

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ژورنال

عنوان ژورنال: Fluids

سال: 2023

ISSN: ['2311-5521']

DOI: https://doi.org/10.3390/fluids8070215