Computational Fluid Dynamics Analysis of Impingement Heat Transfer in an Inline Array of Multiple Jets

Amid all convective heat transfer augmentation methods employing single phase, jet impingement heat transfer delivers significantly higher coefficient of local heat transfer. The arrangement leading to nine jets in square array has been used to cool a plate maintained at constant heat flux. Numerica...

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Bibliographic Details
Published in:Mathematical problems in engineering 2021, Vol.2021, p.1-10
Main Authors: Singh, Parampreet, Grover, Neel Kanth, Agarwal, Vivek, Sharma, Shubham, Singh, Jujhar, Sadeghzadeh, Milad, Issakhov, Alibek
Format: Article
Language:English
Subjects:
Arrays
Computational fluid dynamics
Convective heat transfer
Cooling
Experiments
Fluid dynamics
Fluid flow
Gases
Heat flux
Heat transfer
Heat transfer coefficients
Jet impingement
Kinetic energy
Reynolds number
Separation
Turbulence models
Turbulent flow
Ventilation
Vortices
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Summary:Amid all convective heat transfer augmentation methods employing single phase, jet impingement heat transfer delivers significantly higher coefficient of local heat transfer. The arrangement leading to nine jets in square array has been used to cool a plate maintained at constant heat flux. Numerical study has been carried out using RANS-based turbulence modeling in commercial CFD Fluent software. The turbulent models used for the study are three different “k-ε” models (STD, RNG, and realizable) and SST “k-ω” model. The numerical simulation output is equated with the experimental results to find out the most accurate turbulence model. The impact of variation of Reynolds number, inter-jet spacing, and separation distance has been considered for the geometry considered. These parameters affect the coefficient of heat transfer, temperature, and turbulent kinetic energy related to flow. The local “h” values have been noticed to decline with the rise in separation distance “H/D.” The SST “k-ω” model has been noticed to be in maximum agreement with the experimental results. The average value of heat transfer coefficient “h” reduces from 210 to 193 W/m2K with increase in “H/D” from 6 to 10 at “Re” = 9000 and S/D of 3. As per numerical results, inter-jet spacing “S/D” of 3 has been determined to be the most optimum value.
ISSN:1024-123X
1563-5147
DOI:10.1155/2021/6668942