Hydrodynamic and thermal fields analysis in gas–solid two-phase flow

El-Behery, Samy M.; El‐Askary, W. A.; Hamed, Mofreh H.; Ibrahim, Khaled Z.

doi:10.1016/j.ijheatfluidflow.2011.02.003

Cited by 26 publications

(15 citation statements)

References 41 publications

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“…2. The Eulerian-Lagrangian predictions of El-Behery et al (2011) are also included for comparison. Despite the simplifying assumptions of the one-dimensional model, it predicts the ratio between two-phase and single-phase pressure drops fairly good as compared with the realized Eulerian-Lagrangian model.…”

Section: Model Validationmentioning

confidence: 99%

Prediction of Pressure Drop in Vertical Pneumatic Conveyors

El-Behery

El-Haroun

Abuhegazy

2017

JAFM

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This paper presents a steady state one-dimensional two-fluid model for gas-solid two-phase flow in a vertical riser. The model is solved using conservative variable approach for the gas phase, and fourth order RungeKutta method is used for the solid phase. The model predictions for pressure drop are compared with available experimental data and with Eulerian-Lagrangian predictions, and a good agreement is obtained. The results indicate that the pressure drop increases as the solid mass flow rate, particle size, and particles density increase. In addition, the model predictions for minimum pressure drop velocity are compared with experimental data from literature and the mean percentage error. MPE for minimum pressure drop velocity is -9.89%. It is found that the minimum pressure drop velocity increases as the solid mass flow, particle size and particle density increase, and decreases as the system total pressure increases.

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Section: Model Validationmentioning

confidence: 99%

Prediction of Pressure Drop in Vertical Pneumatic Conveyors

El-Behery

El-Haroun

Abuhegazy

2017

JAFM

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“…The Eulerian-Lagrangian model previously presented by El-Behery et al [7] is used in the present work. In the current research, the model is extended to take into account the effect of compressibility.…”

Section: Numerical and Experimental Study Of Heat Transfer In Gas-solmentioning

confidence: 99%

“…After each given time step the new position of the parcels and the new transitional and angular velocities are calculated from the equations of motion reported by the present authors in Ref. [7,24]. …”

Section: Particle Phase Modelingmentioning

confidence: 99%

“…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%

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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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“…While the details of heat transfer behavior in gas-solid flow are not yet well understood, the early experimental results have already supported the thermal probe's application in solids mass flow-rate measurement [10][11][12]. Experimental investigations have proved that the wall Nusselt number is a function of the solid mass loading ratio.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Analysis and Modification of Thermal Probe for Gas-Solid Measurement

Zhang

Qi²

2016

Mathematical Problems in Engineering

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The presented work aims to measure the gas-solid two-phase mass flow-rate in pneumatic conveyor, and a novel modified thermal probe is applied. A new analysis of the local heat transfer coefficients of thermal probe is presented, while traditional investigations focus on global coefficients. Thermal simulations are performed in Fluent 6.2 and temperature distributions of the probe are presented. The results indicate that the probe has obviously stable and unstable heat transfer areas. Based on understanding of probe characteristics, a modified probe structure is designed, which makes the probe output signal more stable and widens the measuring range. The experiments are carried out in a special designed laboratory scale pneumatic conveyor, and the modified probe shows an unambiguous improvement of the performance compared with the traditional one.

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Hydrodynamic and thermal fields analysis in gas–solid two-phase flow

Cited by 26 publications

References 41 publications

Prediction of Pressure Drop in Vertical Pneumatic Conveyors

Prediction of Pressure Drop in Vertical Pneumatic Conveyors

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

Heat Transfer Analysis and Modification of Thermal Probe for Gas-Solid Measurement

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