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138868

Heat Transfer From Elliptic Cylinder Immersed In A Fluidized Bed

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Last updated: 24 Dec 2024

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Abstract

  In the present work, heat transfer characteristics and flow field from a heated elliptic cylinder immersed in fluidized bed is studied numerically using CFD package. The flow pattern and heat transfer fields around the heated cylinder is predicted using a two fluid Eulerian-Eulerian model coupled with kinetic theory of granular flow (KTGF) with heat transfer. Runs were carried out under uniform heat flux condition, with air as a fluidizing gas and pulverized coal as a bed material. The Reynolds number based on the equivalent cylinder hydraulic diameter, Dh, was ranged from 941to 1263. The simulation results of the present study showed that, for the range of gas velocity considered, at minimum fluidization velocity, Re = 914, the Nuθ is maximum at the sides of the cylinder and minimum at the stagnation, θ=0o, and top, θ=180o, of the cylinder. The average Nusselt number for the elliptic cylinder increases with the increase of the fluidization velocity. The present data is compared with a previous well-known correlation from the literature for a circular cylinder and a reasonable deviation is found.

DOI

10.21608/erj.2020.138868

Keywords

heat transfer, CFD, Elliptic cylinder, Local and average Nusselt numbers, Fluidized Bed

Authors

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Last Name

M. Mandour

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Research Student.

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First Name

M.

Last Name

A. Abd-Rabboa

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Affiliation

Mechanical Engineering Department, Faculty of Engineering, Al-Azhar University.

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First Name

R. Y. Sakrb

Last Name

Y. Sakrb

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Affiliation

Mechanical Engineering Department, Faculty of Engineering Shoubra, Benha University.

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First Name

M.

Last Name

A. Mohammada

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Affiliation

Mechanical Engineering Department, Faculty of Engineering, Al-Azhar University.

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Volume

166

Article Issue

0

Related Issue

20179

Issue Date

2020-06-01

Receive Date

2021-01-12

Publish Date

2020-06-01

Page Start

389

Page End

405

Print ISSN

1110-5615

Article File

ERJ_Volume 166_Issue 0_Pages 389-405.pdf

PDF . 763.3kB

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https://erj.journals.ekb.eg/article_138868.html

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https://erj.journals.ekb.eg/service?article_code=138868

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22

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Original Article

Type Code

998

Publication Type

Journal

Publication Title

Engineering Research Journal

Publication Link

https://erj.journals.ekb.eg/

MainTitle

Heat Transfer From Elliptic Cylinder Immersed In A Fluidized Bed

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Article

Created At

22 Jan 2023