Sensitivity Analysis and Validation of a Two Fluid Method (TFM) model for a Spouted Bed

Cristina Moliner; Filippo Marchelli; Laura Ong; Alfonso Martinez-Felipe; Dominic Van der A; Elisabetta Arato

doi:10.1016/j.ces.2019.06.008

Sensitivity Analysis and Validation of a Two Fluid Method (TFM) model for a Spouted Bed

Cristina Moliner, Filippo Marchelli (Corresponding Author), Laura Ong, Alfonso Martinez-Felipe, Dominic Van der A, Elisabetta Arato

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Abstract

A spouted bed has been simulated through a Computational Fluid Dynamic model using the Two Fluid Method and validated against experimental data. A sensitivity analysis has assessed the influence of the characteristic parameters on the solution. Among them, the accurate selection of the drag law seems to have the strongest influence on the results. In order to extend the capabilities of Ansys Fluent, Di Felice’s drag law was also considered through a User Defined Function. The assessment of the granular phase and its kinetic, collisional and frictional forces, is highly relevant to achieve a correct prediction of the particle velocity profile. The specularity coefficient appears to be more influencing than the restitution coefficient, but both parameters are useful to optimise the model. Overall, the prediction of the particle vertical velocity is accurate whereas the height of the fountain is slightly over-predicted.

Original language	English
Pages (from-to)	39-53
Number of pages	15
Journal	Chemical Engineering Science
Volume	207
Early online date	7 Jun 2019
DOIs	https://doi.org/10.1016/j.ces.2019.06.008
Publication status	Published - 2 Nov 2019

Bibliographical note

This work was funded through the LIFE LIBERNITRATE project (LIFE16 ENV/ES/000419) in the framework of the LIFE+ funding programme.
EA and AMF acknowledge the traineeship Erasmus+ grant for Laura Ong.

Keywords

computational fluid dynamics
two fluid model
multiphase flows
granular materials
Ansys Fluent
Computational fluid dynamics
Granular materials
Two fluid model
Multiphase flows
PROFILES
FLOW PATTERNS
PARTICLE
EQUATIONS
HYDRODYNAMICS
SIMULATION
KINETIC-THEORY
SOLID FLOW
DYNAMICS
THERMAL EXPLOITATION

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Accepted Manuscript
© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Accepted author manuscript, 1.55 MBLicence: CC BY-NC-ND

Cite this

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title = "Sensitivity Analysis and Validation of a Two Fluid Method (TFM) model for a Spouted Bed",

abstract = "A spouted bed has been simulated through a Computational Fluid Dynamic model using the Two Fluid Method and validated against experimental data. A sensitivity analysis has assessed the influence of the characteristic parameters on the solution. Among them, the accurate selection of the drag law seems to have the strongest influence on the results. In order to extend the capabilities of Ansys Fluent, Di Felice{\textquoteright}s drag law was also considered through a User Defined Function. The assessment of the granular phase and its kinetic, collisional and frictional forces, is highly relevant to achieve a correct prediction of the particle velocity profile. The specularity coefficient appears to be more influencing than the restitution coefficient, but both parameters are useful to optimise the model. Overall, the prediction of the particle vertical velocity is accurate whereas the height of the fountain is slightly over-predicted.",

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author = "Cristina Moliner and Filippo Marchelli and Laura Ong and Alfonso Martinez-Felipe and {Van der A}, Dominic and Elisabetta Arato",

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AU - Van der A, Dominic

AU - Arato, Elisabetta

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N2 - A spouted bed has been simulated through a Computational Fluid Dynamic model using the Two Fluid Method and validated against experimental data. A sensitivity analysis has assessed the influence of the characteristic parameters on the solution. Among them, the accurate selection of the drag law seems to have the strongest influence on the results. In order to extend the capabilities of Ansys Fluent, Di Felice’s drag law was also considered through a User Defined Function. The assessment of the granular phase and its kinetic, collisional and frictional forces, is highly relevant to achieve a correct prediction of the particle velocity profile. The specularity coefficient appears to be more influencing than the restitution coefficient, but both parameters are useful to optimise the model. Overall, the prediction of the particle vertical velocity is accurate whereas the height of the fountain is slightly over-predicted.

AB - A spouted bed has been simulated through a Computational Fluid Dynamic model using the Two Fluid Method and validated against experimental data. A sensitivity analysis has assessed the influence of the characteristic parameters on the solution. Among them, the accurate selection of the drag law seems to have the strongest influence on the results. In order to extend the capabilities of Ansys Fluent, Di Felice’s drag law was also considered through a User Defined Function. The assessment of the granular phase and its kinetic, collisional and frictional forces, is highly relevant to achieve a correct prediction of the particle velocity profile. The specularity coefficient appears to be more influencing than the restitution coefficient, but both parameters are useful to optimise the model. Overall, the prediction of the particle vertical velocity is accurate whereas the height of the fountain is slightly over-predicted.

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ER -

Sensitivity Analysis and Validation of a Two Fluid Method (TFM) model for a Spouted Bed

Abstract

Bibliographical note

Keywords

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