Numerical Evaluation of Unsteadiness in Particle Dispersion Modeling

Author:

Ahmadi W.1,Mehdizadeh A.2,Chrigui M.1,Sadiki A.1

Affiliation:

1. Department of Mechanical Engineering, Institute of Energy and Power Plant Technology, Technische Universitat Darmstadt, Darmstadt 64289, Germany e-mail:

2. Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, University Park, State College, PA 16801 e-mail:

Abstract

The paper deals with the issues of stochastic dispersion models for the inertial particle turbulent flow. Thereby, dispersion models are applied to generate the instantaneous velocity of the fluid at particle location to reproduce the effect of turbulence on particle transport within an Eulerian–Lagrangian approach. Especial focus is on the influence of unsteady calculation of carrier phase in combination with unsteady phase coupling. Computations are carried out in a particle-laden turbulent shear flow using three dispersion models. It turns out that accurate prediction of the carrier phase is essential to predict the dispersion in an acceptable level of accuracy.

Publisher

ASME International

Subject

Mechanical Engineering

Reference29 articles.

1. The Influence of an Anisotropic Langevin Dispersion Model on the Prediction of Micro- and Nanoparticle Deposition in Wall-Bounded Turbulent Flows;J. Aerosol Sci.,2010

2. Horender, S., 2005, “Modeling of the Vortex-Structure in a Particle-Laden Mixing-Layer,” ASME Paper No. FEDSM2005-77040.10.1115/FEDSM2005-77040

3. Particle Deposition in Turbulent Duct Flows-Comparisons of Different Model Predictions;J. Aerosol Sci.,2007

4. Fede, P., Simonin, O., Villedieu, P., and Squires, K. D., 2006, “Stochastic Modeling of the Turbulent Subgrid Fluid Velocity Along Inertial Particle Trajectories,” Proceeding of the Summer Program Center for Turbulence Research Stanford University, Stanford, CA, July 9–Aug. 4, pp. 247–258.

5. Sadiki, A., 2005, “Extended Thermodynamics as Modeling Tool of Turbulence Fluid Flows,” Trends in Applications of Mathematics to Mechanics, Shaker Verlag Aachen, Germany, pp. 451–462.

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