Comparison of Eulerian-Lagrangian and Eulerian-Eulerian method for dilute gas-solid flow with side inlet

A Eulerian–Lagrangian method is implemented to simulate turbulent two-phase gas–solid riser flow, using a mean-field/probability density function (PDF) method. The mean-field method is applied to the gas phase while the PDF method is applied to the solid phase. Using the PDF method for the solid phase is advantageous as there is no need for closure models for the convection term in the momentum equation contrary to the situation where the mean-field method is used. The present method is implemented to investigate the influence of a side inlet on the flow pattern in a dilute gas–solid riser configuration. When applying the Eulerian–Lagrangian method, a perfect correspondence with the experimental observations is obtained. On the contrary, when using the Eulerian–Eulerian method significant differences with the experimental data are observed.

[1]  D. C. Haworth,et al.  A probability density function method for turbulent mixing and combustion on three-dimensional unstructured deforming meshes , 2000 .

[2]  D. Gidaspow.  Multiphase Flow and Fluidization: Continuum and Kinetic Theory Descriptions , 1994 .

[3]  Madhava Syamlal,et al.  Evaluation of boundary conditions used to model dilute, turbulent gas/solids flows in a pipe , 2005 .

[4]  Stephen B. Pope,et al.  Consistency conditions for random‐walk models of turbulent dispersion , 1987 .

[5]  William J. Koves,et al.  Kinetic theory based CFD simulation of turbulent fluidization of FCC particles in a riser , 2006 .

[6]  David Parker,et al.  Particle velocities and their residence time distribution in the riser of a CFB , 2010 .

[7]  Asit Kumar Das,et al.  CFD Simulation of Dilute Phase Gas-Solid Riser Reactors : Part II & Simultaneous Adsorption of SO2-NOx from flue gases , 2004 .

[8]  B. Launder,et al.  The numerical computation of turbulent flows , 1990 .

[9]  Jan Vierendeels,et al.  Simultaneous solution algorithms for Eulerian-Eulerian gas-solid flow models: Stability analysis and convergence behaviour of a point and a plane solver , 2005 .

[10]  Guy Marin,et al.  Gas-solids Mixing in the Inlet Zone of a Dilute Circulating Fluidized Bed , 2005 .

[11]  Guy Marin,et al.  Probability density function simulation of turbulent reactive gas‐solid flow in a FCC riser , 2008 .

[12]  Ng Niels Deen,et al.  Review of discrete particle modeling of fluidized beds , 2007 .

[13]  Guy Marin,et al.  Probability Density Function (PDF) Simulation of Turbulent Reactive Gas‐Solid Flow in a Riser , 2008 .

[14]  Jan Baeyens,et al.  Investigation of operational parameters for an industrial CFB combustor of coal, biomass and sludge , 2007 .

[15]  R. Fox.  Computational Models for Turbulent Reacting Flows , 2003 .

[16]  P. Moin,et al.  Large-eddy simulation of swirling particle-laden flows in a coaxial-jet combustor , 2003 .

[17]  S. Pope.  PDF methods for turbulent reactive flows , 1985 .

[18]  D. Boyalakuntla.  Simulation of granular and gas-solid flows using discrete element method , 2003 .

[19]  Vivek V. Ranade,et al.  Computational Flow Modeling for Chemical Reactor Engineering , 2001 .

[20]  N. H. Kolhapure.  PDF Simulations of Ethylene Decomposition in Tubular LDPE Reactors (Journal Review) , 2005 .

[21]  Juray De Wilde,et al.  Experimental Study of Inlet Phenomena of 35° Inclined Non-aerated and Aerated Y-inlets in a Dilute Cold-flow Riser , 2007 .

[22]  Guy Marin,et al.  The Effects of Abrupt T-Outlets in a Riser: 3D Simulation using the Kinetic Theory of Granular Flow , 2003 .

[23]  Pornpote Piumsomboon,et al.  Kinetic theory based computation of PSRI riser: Part I—Estimate of mass transfer coefficient , 2009 .

[24]  Asit Kumar Das,et al.  Three-Dimensional Simulation of a Fluid Catalytic Cracking Riser Reactor , 2003 .

[25]  E. Peirano,et al.  The pdf approach to turbulent polydispersed two-phase flows , 2001 .

[26]  S. Chibbaro,et al.  Langevin PDF simulation of particle deposition in a turbulent pipe flow , 2008, 0806.3577.

[27]  Jan Vierendeels,et al.  CFD simulation of dilute phase gas-solid riser reactors: Part I - a new solution method and flow model validation , 2004 .

[28]  B. Launder,et al.  THE NUMERICAL COMPUTATION OF TURBULENT FLOW , 1974 .

[29]  Jan Vierendeels,et al.  An extension of the preconditioned advection upstream splitting method for 3D two-phase flow calculations in circulating fluidized beds , 2002 .

[30]  Jonathan Seville,et al.  Solid particle motion in a standpipe as observed by Positron Emission Particle Tracking , 2009 .