A CFD modelling on effects of ejection angle of a co-flow on the thermal characteristics for a combined wall and offset jet flow

Nidhal Hnaien; Tanmoy Mondal; Meriem Ajmi; Walid Aich; Badreddine Ayadi; Lioua Kolsi

Alexandria Engineering Journal (Apr 2023)

A CFD modelling on effects of ejection angle of a co-flow on the thermal characteristics for a combined wall and offset jet flow

Nidhal Hnaien,
Tanmoy Mondal,
Meriem Ajmi,
Walid Aich,
Badreddine Ayadi,
Lioua Kolsi

Affiliations

Nidhal Hnaien: Energy Engineering Department, Laboratory of Metrology and Energy Systems, University of Monastir, National Engineering School of Monastir, Monastir, Tunisia
Tanmoy Mondal: Department of Mechanical Engineering, National Institute of Technology Patna, Patna, Bihar-800005, India
Meriem Ajmi: Energy Engineering Department, Laboratory of Metrology and Energy Systems, University of Monastir, National Engineering School of Monastir, Monastir, Tunisia
Walid Aich: Department of Mechanical Engineering, College of Engineering, University of Ha'il, Ha'il City, Saudi Arabia; ISITCom, University of Sousse, Gp1, 4011 Hammam Sousse, Tunisia
Badreddine Ayadi: Department of Mechanical Engineering, College of Engineering, University of Ha'il, Ha'il City, Saudi Arabia; Laboratory of Applied Fluid Mechanics, Environment and Process Engineering “LR11ES57”, National School of Engineers of Sfax (ENIS), University of Sfax, Soukra Road Km 3.5, 3038 Sfax, Tunisia
Lioua Kolsi: Department of Mechanical Engineering, College of Engineering, University of Ha'il, Ha'il City, Saudi Arabia; Corresponding author.

Journal volume & issue: Vol. 68
pp. 83 – 91

Abstract

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In the present study, a CFD simulation of a flow combined an offset jet and a wall jet (noted dual-jet) with the presence of co-flow is carried out. The effect of the intensity of the co-flow CFV (co-flow velocity) as well as its ejection angle α on the heat transfer exchanged in dual-jet flow is also performed. The present simulations are carried out for a Reynolds number Re = 15000, a nozzle-to-nozzle distance equal to 4 times the thickness of the nozzle, a co-flow velocity CFV = 10% − 40 % and a co-flow ejection angle α = 0° − 40°. The results of this computational study clearly show an intensification of the heat transfer exchanged between the flow and the wall by increasing the co-flow velocity CFV as well as its ejection angle α.

Published in Alexandria Engineering Journal

ISSN: 1110-0168 (Print); 2090-2670 (Online)
Publisher: Elsevier
Country of publisher: Egypt
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: http://www.journals.elsevier.com/alexandria-engineering-journal/

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