Abstract
This research deals with development of a mathematical model which may account for the phenomenon of turbulence variation in dilute air-particle turbulent flows. The underlying formulation scheme adopts an Eulerian-Lagrangian reference frame, i.e. the carrier phase is considered as a continuum system, while the trajectories of individual particles are calculated using a Lagrangian frame work. A random walk model is employed to simulate the turbulence velocities. The new developed model as well the selected models from the literature is used to simulate a particle-laden vertical pipe flow. The calculated results show that the new model provides improved predictions of the experimental data.
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