A comparative study of different CFD-codes for numerical simulation of gas–solid fluidized bed hydrodynamics

Herzog, Nicoleta; Schreiber, M. R.; Egbers, Christoph; Krautz, Hans Joachim

doi:10.1016/j.compchemeng.2011.12.002

“…In the Euler-Lagrange approach, the gas phase is treated as continua while the solid phases are treated as discrete particles. There are also many drag models that have been developed to investigate the interaction between gas and solid particles in fluidized bed, such as the Syamlal and O'Brien, Wen and Yu and Gidaspow drag models [1,4,7]. Unfortunately, in only a limited number of studies have researchers combine both numerical and experimental investigations on the hydrodynamics of a gas-solid fluidized beds.…”

Section: Introductionmentioning

confidence: 99%

“…In the literature, there are two different numerical approaches for modelling the hydrodynamics of gas-solid two-phase flow with CFD simulation: the Euler-Euler and the Euler-Lagrange method [7]. The Euler-Euler method treats each phase as an interpenetrating continuum.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation and experimental validation of the hydrodynamics in a 350 kW bubbling fluidized bed combustor

Belhadj

¹

,

Chilton

²

,

Nimmo

³

et al. 2016

Int J Energy Environ Eng

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This paper presents experimentally validated three-dimensional numerical simulation of a 350 kW pilotscale bubbling fluidized bed combustor, which has been developed by using commercial CFD software package, Fluent 14.5. The solid particle distribution has been simulated by using the multiphase Euler-Euler Approach. The gas-solid momentum exchange coefficients were calculated by using Syamlal and O'Brien drag functions. The CFD model is created as the realistic representation of the actual pilot-scale bubbling fluidized bed. All simulations are performed in transient mode for an operation time of about 350 s. The experimental study is performed with silica sand particles with mean particle size of 0.6 mm and density of 1639 kg/m 3 . The bed was filled with particles up to a height of 0.30 m. The same conditions are used for the simulations. The present work combines both experimental and computational studies, where the CFD-Simulation results are compared to those obtained by experiments. The predicted simulation results of minimum fluidization velocity and pressure drop values of the pilot-scale bubbling fluidized bed combustor have good agreement with the experimental measurements.

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“…The drag models of Syamlal and O'Brien, Wen and Yu and Gidaspow are the most used models in the investigation of the hydrodynamic behaviour in gas-solid bubbling fluidized beds [5][6][7]. Unfortunately, there are only a limited works introduced in the literature, where researchers applied both experimental and numerical investigations to validate the numerical results.…”

Section: Introductionmentioning

confidence: 99%

Numerical Model and Experimental Validation of the Hydrodynamics in an Industrial-Scale Sewage Sludge Bubbling Fluidized Bed Incinerator

Belhadj¹,

Nimmo²

2017

IJERA

0

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This paper describes a development of a numerical model and experimental validation of the hydrodynamics in industrial-scale sewage sludge bubbling fluidized bed incinerator. The numerical model and simulations are performed using commercial CFD software package ANSYS Fluent 14.5. The complex geometry of the developed numerical model represents the actual industrial-scale bubbling fluidized bed combustor. The gassolid flow behaviour inside the bed was described using the Eulerian-Eulerian multiphase model. The momentum exchange coefficients between the gas phase and solid particles were described by the Syamlal and O'Brien drag model equations. The CFD transient simulations were run for 350 seconds at the optimum operating conditions of the used fluidized bed with bed temperature of 850°C. The experiments were carried out using quartz sand with three different particle sizes having a diameters ranging from 0.5 mm to 1.5 mm and a density of 2650 kg/m³. The industrial-scale furnace was filled with bed material to a bed height of 0.85 m. The same operating parameters have been applied for both experimental and numerical studies. The hydrodynamics of the gas-solid industrial-scale bubbling fluidized bed at operating conditions are investigated in the CFD numerical model and simulations of this three-dimensional (3D) complex geometry. To estimate the prediction quality of the simulations based on the developed numerical model, the minimum fluidization gas velocity and pressure drop results obtained from the CFD simulations are validated with the experimental measurements. The generated simulation results of the pressure drop and minimum fluidization gas velocity of the industrial-scale sewage sludge incinerator based the Eulerian-Eulerian method and Syamlal and O'Brien drag model are in good agreement with the experimental measured data.

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“…There are generally two different approaches for the numerical study of the gas-solid multiphase flow with CFD (Computational Fluid Dynamics) applied and reported in the literature, the Euler-Euler and Euler-Lagrange method [4,5]. In the Euler-Euler method, both phases the continuous gas phase and solid particle phase are calculated as a continuum in a fixed volume control.…”

Section: Introductionmentioning

confidence: 99%

Untitled

2017

IJERA

0

View full text Add to dashboard Cite

This paper describes a development of a numerical model and experimental validation of the hydrodynamics in industrial-scale sewage sludge bubbling fluidized bed incinerator. The numerical model and simulations are performed using commercial CFD software package ANSYS Fluent 14.5. The complex geometry of the developed numerical model represents the actual industrial-scale bubbling fluidized bed combustor. The gassolid flow behaviour inside the bed was described using the Eulerian-Eulerian multiphase model. The momentum exchange coefficients between the gas phase and solid particles were described by the Syamlal and O'Brien drag model equations. The CFD transient simulations were run for 350 seconds at the optimum operating conditions of the used fluidized bed with bed temperature of 850°C. The experiments were carried out using quartz sand with three different particle sizes having a diameters ranging from 0.5 mm to 1.5 mm and a density of 2650 kg/m³. The industrial-scale furnace was filled with bed material to a bed height of 0.85 m. The same operating parameters have been applied for both experimental and numerical studies. The hydrodynamics of the gas-solid industrial-scale bubbling fluidized bed at operating conditions are investigated in the CFD numerical model and simulations of this three-dimensional (3D) complex geometry. To estimate the prediction quality of the simulations based on the developed numerical model, the minimum fluidization gas velocity and pressure drop results obtained from the CFD simulations are validated with the experimental measurements. The generated simulation results of the pressure drop and minimum fluidization gas velocity of the industrial-scale sewage sludge incinerator based the Eulerian-Eulerian method and Syamlal and O'Brien drag model are in good agreement with the experimental measured data.

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A comparative study of different CFD-codes for numerical simulation of gas–solid fluidized bed hydrodynamics

Cited by 74 publications

References 18 publications

Numerical simulation and experimental validation of the hydrodynamics in a 350 kW bubbling fluidized bed combustor

Numerical simulation and experimental validation of the hydrodynamics in a 350 kW bubbling fluidized bed combustor

Numerical Model and Experimental Validation of the Hydrodynamics in an Industrial-Scale Sewage Sludge Bubbling Fluidized Bed Incinerator

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