Modeling of heat transfer in turbulent gas–solid flow

Mansoori, Z.; Saffar‐Avval, Majid; Tabrizi, Hassan Basirat; Ahmadi, Goodarz

doi:10.1016/s0017-9310(01)00234-4

Cited by 49 publications

(30 citation statements)

References 12 publications

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“…The vertical two-phase flow systems are important because of their desirable characteristics for use in chemical and biochemical reactors. Unlike many studies of heat and mass transfer in the vertical flow of gas-particle, that include a wide area of application (Matsumoto et al, 1978;Duduković et al, 1996;Mansoori et al, 2002), in the literature are much less data for momentum, heat and mass transfer in systems with the vertical flow of liquid-coarse particles.…”

Section: Background Of Heterogeneous Systemsmentioning

confidence: 99%

Hydrodynamics and Mass Transfer in Heterogeneous Systems

Garić‐Grulović¹,

Bošković‐Vragolović²,

Grbavčić³

et al. 2011

Advanced Topics in Mass Transfer

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Section: Background Of Heterogeneous Systemsmentioning

confidence: 99%

Hydrodynamics and Mass Transfer in Heterogeneous Systems

Garić‐Grulović¹,

Bošković‐Vragolović²,

Grbavčić³

et al. 2011

Advanced Topics in Mass Transfer

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“…Where is Reynolds stress tensor, p s is the solids pressure, (−ε s ∇p+ β gs ( -)) is an interaction force (drag and buoyancy forces) representing the momentum transfer between gas and solid phase and g is the gravitational constant, [15,16].…”

Section: Governing Equationsmentioning

confidence: 99%

“…The granular stress is given by (16) λ s v , the second coefficient of viscosity and µ s v , the shear viscosity for the solid phase, respectively, are given by (17) (18) Where (19) And the constant K 3 is given by (20) g 0, ss is the radial distribution function that for solid phase [8,22], use (21) where e ss is the coefficient of restitution for particle collisions and that is approximately constant.…”

Section: Governing Equationsmentioning

confidence: 99%

Numerical and experimental investigation of a fluidized bed chamber hydrodynamics with heat transfer

Hamzehei

Rahimzadeh

2010

Korean J. Chem. Eng.

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The hydrodynamics and heat transfer of a gas-solid fluidized bed chamber was investigated by computational fluid dynamic (CFD) techniques. A multifluid Eulerian model incorporating the kinetic theory for solid particles was applied to simulate the unsteady state behavior of this chamber. For momentum exchange coefficients, Syamlal-O'Brien drag functions were used. A suitable numerical method that employed finite volume method was applied to discretize the equations. The simulation results also indicated that small bubbles were produced at the bottom of the bed. These bubbles collided with each other as they moved upwards forming larger bubbles. Also, the solid particle temperature effect on heat transfer and hydrodynamics was studied. Simulation results were compared with the experimental data in order to validate the CFD model. Pressure drops and mean gas temperature predicted by the simulations at different positions in the chamber were in good agreement with experimental measurements at gas velocities higher than the minimum fluidization velocity. Furthermore, this comparison showed that the model could predict hydrodynamics and heat transfer behaviors of gas solid fluidized bed reasonably well.

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“…Soo [6] reported that, the modes of heat transfer in gas solid systems are fl ow-to-surface, gasto-particle and inter-particles heat transfer. The heat transfer from the pipe wall to the fl owing suspension was studied numerically using either Eulerian-Eulerian or Eulerian-Lagrangian approaches [7][8][9][10][11][12][13]. These investigations were carried out under either constant wall heat fl ux or constant wall temperature boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study of heat transfer in gas-solid flow: Particle cooling

El-Behery

El‐Askary

Hamed

et al. 2012

IRASE

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Heat transfer in gas-solid two-phase fl ow is investigated numerically and experimentally. The numerical computations are carried out using four-way coupling Eulerian-Lagrangian approach. The effects of particle rotation and lift forces are included in the model. The gas-phase turbulence is modeled via low Reynolds number k-ε turbulence models. The SIMPLE algorithm is extended to take the effect of compressibility into account. The experimental study is performed using crushed limestone to simulate the solid phase. The effects of Reynolds numbers, particles size and temperature on the pressure drop and the temperature of the phases are investigated. The model predictions are found to be in a good agreement with available experimental data for high speed gassolid fl ow and present experimental data for low speed fl ow. The present results indicate that heat transfer in gas solid fl ow can be modeled using ideal gas incompressible fl ow model at low conveying speed, while for high speed fl ow, a full compressible model should be used.

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Modeling of heat transfer in turbulent gas–solid flow

Cited by 49 publications

References 12 publications

Hydrodynamics and Mass Transfer in Heterogeneous Systems

Hydrodynamics and Mass Transfer in Heterogeneous Systems

Numerical and experimental investigation of a fluidized bed chamber hydrodynamics with heat transfer

Numerical and experimental study of heat transfer in gas-solid flow: Particle cooling

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