Principles of Gas-Solid Flows

Fan, Liang‐Shih; Zhu, Chao

doi:10.1017/cbo9780511530142

Cited by 270 publications

(232 citation statements)

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“…They are wall frictional loss component and gravitational component, Fan and Zhu (1998). The present experimental data exhibit the relation between the solid gas flow pressure drops between the linear gas velocities, shown by Figure 5.…”

Section: Figuresupporting

confidence: 65%

“…In most cases, the pressure drop in the multiphase flow is higher than pressure drop in the one phase flow. According to Fan and Zhu [2], in the multiphase flow, pressure drop is caused not only by friction of gas molecules, but also by interaction between gas and solids, between solids itself, and external forces such as gravitational force, and electrostatic force. Those forces between solids and external forces cannot affect the gas motion directly, but it has effect on interaction system between gas and solid.…”

Section: Fundamentalmentioning

confidence: 99%

“…In the dilute-phase flow, interaction between solid particles is insignificant compared to that in dense phase. According to Fan and Zhu [2], dilute and dense-phase can be identified by pressure drop to air velocity relation tendency. The solid-gas flow in the pneumatic conveying system is generally characterized by the relation between pressure drop to liner gas velocity.…”

Section: Fundamentalmentioning

confidence: 99%

“…High maintenance cost usually occurs due to high friction factor of the gas-solid particle in which it contributes to higher power consumption. Another reason to high cost is shorter life time the ducting pipes that is caused by solid particle attrition, and abrasion [2].…”

Section: Introductionsmentioning

confidence: 99%

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Pressure Drop Correlation Covering Dilute to Dense Regimes of Solid Particle-Gas Flow in a Vertical Conveying Pipe

Bindar¹,

Sutrisniningrum²,

Santiani³

2009

itbj.eng.sci.

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Abstract. More general correlations between pressure drop and gas-solid flow variables are developed from the present experimental data. The correlation was modeled for a pneumatic conveying system in a vertical pipe. The transition boundary between dense and dilute regimes is constructed from the pressure drop correlations. The gas-solid particle flow variables are quantified by the gas Reynolds (N ref ) and the solid Froude (F rp ) numbers. The dense flow regime is indicated by the decrease of the pressure drop with the increase of the gas Reynolds number. In contrary, the dilute regime exhibits the increase of the pressure drop with the gas Reynolds number. The proposed correlations were built at the range of gas Reynolds number f from 360 to 500 and solid Froude number from 0,01 to 0,02.

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Section: Figuresupporting

confidence: 65%

Section: Fundamentalmentioning

confidence: 99%

Section: Fundamentalmentioning

confidence: 99%

Section: Introductionsmentioning

confidence: 99%

See 2 more Smart Citations

Pressure Drop Correlation Covering Dilute to Dense Regimes of Solid Particle-Gas Flow in a Vertical Conveying Pipe

Bindar¹,

Sutrisniningrum²,

Santiani³

2009

itbj.eng.sci.

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“…In numerical simulations of fluid-particle flows, the continuous (fluid) phase is typically modeled via an Eulerian approach, while the motion of the dispersed (solid particle) phase is predicted using either a Eulerian or a Lagrangian approach [1][2][3]. The Lagrangian approach is well suited for the description of the dispersed phase in the so-called dilute fluid-particle flows, in which the particle dynamics is controlled primarily by surface and body forces acting on the particle rather than by particle-particle collisions or interactions.…”

Section: Introductionmentioning

confidence: 99%

Numerical model for the prediction of dilute, three‐dimensional, turbulent fluid–particle flows, using a Lagrangian approach for particle tracking and a CVFEM for the carrier phase

Oliveira

Costa

Baliga

2008

Numerical Methods in Fluids

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SUMMARYA numerical model for dilute, three-dimensional, turbulent, incompressible fluid-solid particle flows and its application to a demonstration problem are presented. An Eulerian description is used to model the flow of the fluid (carrier) phase, and the governing equations are solved using a control-volume finite element method (CVFEM). The motion of the solid (particulate) phase is simulated using a Lagrangian approach. An efficient algorithm is proposed for locating the particles in the finite element mesh. In the demonstration problem, which involves a particle-laden axisymmetric jet, a modified k-turbulence model is used to characterize the velocity and length scales of the turbulent flow of the fluid phase. The effect of turbulence on the particle trajectories is accounted for through a stochastic model. The effect of the particles on the fluid time-mean velocity and turbulence (two-way coupling) is also addressed. Comparisons between predictions and available experimental data for the demonstration problem are presented. Satisfactory agreement is obtained.

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Fluidization

Fan

Zhue

Wang

2020

Kirk-Othmer Encyclopedia of Chemical Technology

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Fluidization refers to a state of particle movements in which the particles are suspended in the presence of a carrying fluid flow with the carrying fluid being a gas, a liquid, or a gas–liquid mixture. In two‐phase fluidization, fluid and solids can be in semi‐batch or continuous flow conditions or co‐current or countercurrent flow conditions. The gravitational force that acts on the particles in fluidization can be counterbalanced by the hydrodynamic forces such as the drag force and possibly other field forces. Under the semi‐batch condition, the minimum fluidization velocity defines the onset of fluidization. When the fluid velocity sufficiently exceeds the minimum fluidization velocity, the particles move apart and become suspended, and the bed enters the fluidized state. In fluidization, when the fluid velocity is relative low, the bed is characterized by a dense fluid‐particle suspension with little amount of particles entrained from the column by the carrying fluid. At a higher fluid velocity, the dense bed surface becomes indistinguishable with a large amount of particles entrained from the bed. When a significant particle entrainment takes place, the fluidization state can be maintained by external circulation of the entrained particles.

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Principles of Gas-Solid Flows

Cited by 270 publications

References 0 publications

Pressure Drop Correlation Covering Dilute to Dense Regimes of Solid Particle-Gas Flow in a Vertical Conveying Pipe

Pressure Drop Correlation Covering Dilute to Dense Regimes of Solid Particle-Gas Flow in a Vertical Conveying Pipe

Numerical model for the prediction of dilute, three‐dimensional, turbulent fluid–particle flows, using a Lagrangian approach for particle tracking and a CVFEM for the carrier phase

Fluidization

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