Journal ArticleDOI
Modeling of saltation and turbulence effects in a horizontal gas-solid boundary layer
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In this article, a two-fluid model is selected to analyze the particle motion in the mixed regime where both saltation and turbulence effects are important, and boundary layer approximations are applied to the solid phase equations, using conventional space/time averaging.Abstract:
This work is devoted to the study of the behavior of solid particles in a horizontal air boundary layer. A two-fluid model is selected to analyze the particle motion in the mixed regime where both saltation and turbulence effects are important. Boundary layer approximations are applied to the solid phase equations, using conventional space/time averaging. Resulting equations are shown to be in agreement with the phase averaged equations generally used in two-fluid models. Closure is achieved by means of a gradient law, however the particle diffusion and momentum transfer coefficients are distinguished using a variable particle Schmidt number. Turbulent particle diffusion is modeled using an available analytical model, which is modified to take the saltation effect into account in the particle r.m.s. velocity. Comparison between experimental and numerical results shows that the following analysis is acceptable within the experimental and numerical error. The model slightly underestimates the parti...read more
Citations
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Journal ArticleDOI
Particle behavior in the turbulent boundary layer of a dilute gas-particle flow past a flat plate
Jun Wang,Edward K. Levy +1 more
TL;DR: Particle behavior in the turbulent boundary layer of a dilute gas-particle flow past a 1.5-m long flat plate was studied experimentally using a miniature fiber optic probe, and numerically using CFD software as discussed by the authors.
Journal ArticleDOI
Numerical Simulation for Hydrodynamic Analysis and Pressure Drop Prediction in Horizontal Gas-Solid Flows
Pandaba Patro,Sukanta K. Dash +1 more
TL;DR: Two fluid or Eulerian modeling incorporating the kinetic theory for granular particles and accounting for four-way coupling was performed to investigate the hydrodynamics and pressure drop characteristics of gas-solid flows in horizontal pipes as mentioned in this paper.
Book ChapterDOI
Turbulent Boundary Layer Gas–Solid Flow Based on Two-Fluid Model
TL;DR: In this article, a two-fluid approach for evaluating the effect of different forces on small particle deposition from a turbulent flow over a flat plate produced similar finding compared to Lagrangian method and computationally less expensive.
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