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

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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© 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.",

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",

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

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.",

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doi = "10.1016/j.ces.2019.06.008",

language = "English",

volume = "207",

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AU - Moliner, Cristina

AU - Marchelli, Filippo

AU - Ong, Laura

AU - Martinez-Felipe, Alfonso

AU - Van der A, Dominic

AU - Arato, Elisabetta

N1 - 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.

PY - 2019/11/2

Y1 - 2019/11/2

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.

KW - computational fluid dynamics

KW - two fluid model

KW - multiphase flows

KW - granular materials

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KW - Granular materials

KW - Two fluid model

KW - Multiphase flows

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KW - EQUATIONS

KW - HYDRODYNAMICS

KW - SIMULATION

KW - KINETIC-THEORY

KW - SOLID FLOW

KW - DYNAMICS

KW - THERMAL EXPLOITATION

UR - https://linkinghub.elsevier.com/retrieve/pii/S0009250919305068

UR - http://www.mendeley.com/research/sensitivity-analysis-validation-two-fluid-method-tfm-model-spouted-bed

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JO - Chemical Engineering Science

JF - Chemical Engineering Science

SN - 0009-2509

ER -

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

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