A novel methodology for simulating vibrated fluidized beds using two-fluid models

Acosta-Iborra, A.; Hernández-Jiménez, F.; Vega, M. de; Briongos, Javier Villa

doi:10.1016/j.cej.2012.05.098

Cited by 30 publications

(16 citation statements)

References 30 publications

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“…More information concerning this transformation of equations can be found in Acosta-Iborra et al [19].…”

Section: Two-fluid Modelling Of Vibrating Fluidized Bedmentioning

confidence: 97%

“…[ Following the methodology proposed by Acosta-Iborra et al [19], the procedure conducted here to introduce the oscillatory displacement of the bed vessel in the simulation consists in the solution of the governing equations using a system of reference that moves with the base of the bed vessel. After performing this change in the governing equations, vibration appears in the two-fluid model constitutive equations as an equivalent mass force (see Table 1) acting in both the gas and the solid momentum balance equations:…”

Section: Two-fluid Modelling Of Vibrating Fluidized Bedmentioning

confidence: 99%

“…As an answer to the difficulties of the Lagrangian-Eulerian (CFD-DEM) simulations, Acosta-Iborra et al [19] proposed the simulation of vibrated fluidized beds by solving the two-fluid (Eulerian-Eulerian) model CFD equations [27,28] in a coordinate system that moves with the bed. Thus, vibration is transformed into acceleration terms that are introduced in the simulations as body forces in both the gas and particle phases.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compressible-gas two-fluid modeling of isolated bubbles in a vertically vibrated fluidized bed and comparison with experiments

Cano-Pleite

Hernández-Jiménez

Acosta-Iborra

2015

Chemical Engineering Journal

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“…More information concerning this transformation of equations can be found in Acosta-Iborra et al [19].…”

Section: Two-fluid Modelling Of Vibrating Fluidized Bedmentioning

confidence: 97%

Section: Two-fluid Modelling Of Vibrating Fluidized Bedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Compressible-gas two-fluid modeling of isolated bubbles in a vertically vibrated fluidized bed and comparison with experiments

Cano-Pleite

Hernández-Jiménez

Acosta-Iborra

2015

Chemical Engineering Journal

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“…(18). Varying the superficial gas velocity leads to a change in the coefficients W and d that may affect f and K corrected,2D used for the normalization in Fig.…”

Section: Effect Of the Superficial Gas Velocitymentioning

confidence: 99%

“…In the development and application of these techniques, careful valida tion with either experimental data or theoretical models is re quired [12]. As a result, several reports have appeared in this field comparing the simulation results with experimental data in different regimes and operative conditions such as solids hold up distribution and circulation patterns [13], bubble behavior in a two dimensional (2D) bed [14], solids velocity and bubble characteristics in 2D fluidized beds [15,16], bubble behavior in 3D fluidized beds [17], and pressure drop and bubble behavior in vibrated fluidized beds [18].…”

mentioning

confidence: 99%

Gas interchange between bubble and emulsion phases in a 2D fluidized bed as revealed by two-fluid model simulations

Hernández-Jiménez

Gómez-García

Santana

et al. 2013

Chemical Engineering Journal

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Using two fluid model simulations, the present work aims at characterizing the interchange due to gas advection between the emulsion phase and bubbles in fully bubbling beds of Geldart group B particles that are fluidized with air. In the studied beds the bubbles are slow, which means that the advection transport of gas through the bubble boundary is the main mechanism of gas interchange. In an initial ver ification step, the pressure distribution and the gas interchange coefficient for isolated bubbles obtained in the two fluid simulation are compared with the classical potential flow theory of fluidized beds, pro viding concordant results. In a second step, the work analyzes the gas interchange in fully bubbling beds and the effects of the superficial velocity, bed height, and particle diameter on the interchange coefficient and the crossflow ratio. The results indicate that both the interchange coefficient and the crossflow ratio in bubbling beds are about two times those predicted by the potential theory of isolated bubbles. A cor rected model for the gas interchange is proposed based on the introduction of the gas throughflow into the classical potential flow theory. As a consequence, the gas interchange coefficient in the corrected model is a function of the superficial gas velocity instead of the minimum fluidization velocity.

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Numerical Simulation of Particle Segregation in Vibration Fluidized Beds

et al. 2014

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The influence of vibration parameters on the segregation phenomenon of a binary mixture in a vibration fluidized bed is investigated. Initially, the mixture composed of spherical balls with different densities but same diameter is in a perfect mixing state in the bed. The motion of particles is simulated based on the discrete element method. The effects of friction coefficient, vibration frequency, amplitudes, and gas velocity are analyzed. The coefficient of segregation to the degree of particle segregation is calculated for different operating conditions. The segregation degree in the vibration fluidized bed is found to be higher than that in the bed without vibration. The curve for the segregation degree exhibits a single peak value which represents the optimal segregation result.

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A novel methodology for simulating vibrated fluidized beds using two-fluid models

Cited by 30 publications

References 30 publications

Compressible-gas two-fluid modeling of isolated bubbles in a vertically vibrated fluidized bed and comparison with experiments

Compressible-gas two-fluid modeling of isolated bubbles in a vertically vibrated fluidized bed and comparison with experiments

Gas interchange between bubble and emulsion phases in a 2D fluidized bed as revealed by two-fluid model simulations

Numerical Simulation of Particle Segregation in Vibration Fluidized Beds

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