Evaluation of hydrodynamic behavior of urea granules in a pseudo-2D fluidized bed using drag models and comparison with PIV technique

The urea fluidized bed hydrodynamics were simulated using computational fluid dynamics (CFD) vs. image processing technique. To identify the suitable model, sensitivity analyses on time step, number of nodes, and drag force coefficient were performed, and accordingly, Gidaspow and Syamlal�O�Brien...

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Main Authors: Zhalehrajabi, E., Lau, K.K., Hagemeier, T., Idris, A.
Format: Article
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.33374 /
Published: Elsevier B.V. 2022
Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131404142&doi=10.1016%2fj.powtec.2022.117578&partnerID=40&md5=0ca9cda28a7d04e90c2b23911609d4b3
http://eprints.utp.edu.my/33374/
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spelling utp-eprints.333742022-07-26T08:20:12Z Evaluation of hydrodynamic behavior of urea granules in a pseudo-2D fluidized bed using drag models and comparison with PIV technique Zhalehrajabi, E. Lau, K.K. Hagemeier, T. Idris, A. The urea fluidized bed hydrodynamics were simulated using computational fluid dynamics (CFD) vs. image processing technique. To identify the suitable model, sensitivity analyses on time step, number of nodes, and drag force coefficient were performed, and accordingly, Gidaspow and Syamlal�O�Brien drag models were selected to simulate the fluidized bed for - particles categorized under Geldart-D. The CFD data were validated against the determined particle velocity using an image processing technique. Results indicate that Gidaspow model predictions for particles velocity and granular temperature are in good agreement whereas the Syamlal�O�Brien model resulted in underestimated predictions. Further analysis using Gidaspow model, the particle velocity increased by 12.5, when the air inlet velocity is increased from 2 to 3 m/s and decreased by 87.5 when the particle sizes are changed from 2 to 4 mm. Although the primary loading height and pressure showed no effect, but at high pressures, it is important to consider humidity to avoid the negative impact on the granulation performance. © 2021 Elsevier B.V. 2022 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131404142&doi=10.1016%2fj.powtec.2022.117578&partnerID=40&md5=0ca9cda28a7d04e90c2b23911609d4b3 Zhalehrajabi, E. and Lau, K.K. and Hagemeier, T. and Idris, A. (2022) Evaluation of hydrodynamic behavior of urea granules in a pseudo-2D fluidized bed using drag models and comparison with PIV technique. Powder Technology, 406 . http://eprints.utp.edu.my/33374/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
description The urea fluidized bed hydrodynamics were simulated using computational fluid dynamics (CFD) vs. image processing technique. To identify the suitable model, sensitivity analyses on time step, number of nodes, and drag force coefficient were performed, and accordingly, Gidaspow and Syamlal�O�Brien drag models were selected to simulate the fluidized bed for - particles categorized under Geldart-D. The CFD data were validated against the determined particle velocity using an image processing technique. Results indicate that Gidaspow model predictions for particles velocity and granular temperature are in good agreement whereas the Syamlal�O�Brien model resulted in underestimated predictions. Further analysis using Gidaspow model, the particle velocity increased by 12.5, when the air inlet velocity is increased from 2 to 3 m/s and decreased by 87.5 when the particle sizes are changed from 2 to 4 mm. Although the primary loading height and pressure showed no effect, but at high pressures, it is important to consider humidity to avoid the negative impact on the granulation performance. © 2021
format Article
author Zhalehrajabi, E.
Lau, K.K.
Hagemeier, T.
Idris, A.
spellingShingle Zhalehrajabi, E.
Lau, K.K.
Hagemeier, T.
Idris, A.
Evaluation of hydrodynamic behavior of urea granules in a pseudo-2D fluidized bed using drag models and comparison with PIV technique
author_sort Zhalehrajabi, E.
title Evaluation of hydrodynamic behavior of urea granules in a pseudo-2D fluidized bed using drag models and comparison with PIV technique
title_short Evaluation of hydrodynamic behavior of urea granules in a pseudo-2D fluidized bed using drag models and comparison with PIV technique
title_full Evaluation of hydrodynamic behavior of urea granules in a pseudo-2D fluidized bed using drag models and comparison with PIV technique
title_fullStr Evaluation of hydrodynamic behavior of urea granules in a pseudo-2D fluidized bed using drag models and comparison with PIV technique
title_full_unstemmed Evaluation of hydrodynamic behavior of urea granules in a pseudo-2D fluidized bed using drag models and comparison with PIV technique
title_sort evaluation of hydrodynamic behavior of urea granules in a pseudo-2d fluidized bed using drag models and comparison with piv technique
publisher Elsevier B.V.
publishDate 2022
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131404142&doi=10.1016%2fj.powtec.2022.117578&partnerID=40&md5=0ca9cda28a7d04e90c2b23911609d4b3
http://eprints.utp.edu.my/33374/
_version_ 1741197843761201152
score 11.62408

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