On heat transfer and flow characteristics of jets impingement on a concave surface with varying pin-fin arrangements
(2021) In International Journal of Thermal Sciences 170.- Abstract
Numerical simulations have been conducted to investigate the effects of pin-fin arrangement and jet Reynolds number on heat transfer enhancement and flow characteristics of a concave confined jet impingement cooled surface conjugated with pin-fins. The results without a pin-fin are used as a baseline. Vortices and different sections of streamlines in the channel are employed to understand the flow structures in this cooling system. Based on this, topology pictures are obtained with skin-friction lines to discuss the fluid flow near the target and pin-fin surface. The local and averaged heat transfer characteristics are analyzed using the flow characteristics. The overall parameters (friction factor, thermal performance, pumping power)... (More)
Numerical simulations have been conducted to investigate the effects of pin-fin arrangement and jet Reynolds number on heat transfer enhancement and flow characteristics of a concave confined jet impingement cooled surface conjugated with pin-fins. The results without a pin-fin are used as a baseline. Vortices and different sections of streamlines in the channel are employed to understand the flow structures in this cooling system. Based on this, topology pictures are obtained with skin-friction lines to discuss the fluid flow near the target and pin-fin surface. The local and averaged heat transfer characteristics are analyzed using the flow characteristics. The overall parameters (friction factor, thermal performance, pumping power) are also obtained. The results show that the appearance of the pin-fin plays a positive role in heat transfer enhancement and uniformity. The case of a 35° pin-fin arrangement angle reaches the highest overall Nusselt number and heat transfer uniformity. The far away movement of the pin-fin is beneficial to decrease pumping power at a constant heat transfer. The thermal performance is highest for 55° pin-fin arrangement angle at a jet Reynolds number of 40,000 in this work.
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- author
- Qiu, Dandan LU ; Luo, Lei ; Zhao, Zhiqi LU ; Wang, Songtao ; Wang, Zhongqi and Sundén, Bengt LU
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Flow structure, Heat transfer, Jet impingement, Pin-fin, Topology analysis
- in
- International Journal of Thermal Sciences
- volume
- 170
- article number
- 107163
- publisher
- Elsevier
- external identifiers
-
- scopus:85110461826
- ISSN
- 1290-0729
- DOI
- 10.1016/j.ijthermalsci.2021.107163
- language
- English
- LU publication?
- yes
- id
- a3ae50e1-ea1a-42c6-b936-da041c66ce85
- date added to LUP
- 2021-08-19 14:27:06
- date last changed
- 2023-11-08 17:38:10
@article{a3ae50e1-ea1a-42c6-b936-da041c66ce85,
abstract = {{<p>Numerical simulations have been conducted to investigate the effects of pin-fin arrangement and jet Reynolds number on heat transfer enhancement and flow characteristics of a concave confined jet impingement cooled surface conjugated with pin-fins. The results without a pin-fin are used as a baseline. Vortices and different sections of streamlines in the channel are employed to understand the flow structures in this cooling system. Based on this, topology pictures are obtained with skin-friction lines to discuss the fluid flow near the target and pin-fin surface. The local and averaged heat transfer characteristics are analyzed using the flow characteristics. The overall parameters (friction factor, thermal performance, pumping power) are also obtained. The results show that the appearance of the pin-fin plays a positive role in heat transfer enhancement and uniformity. The case of a 35° pin-fin arrangement angle reaches the highest overall Nusselt number and heat transfer uniformity. The far away movement of the pin-fin is beneficial to decrease pumping power at a constant heat transfer. The thermal performance is highest for 55° pin-fin arrangement angle at a jet Reynolds number of 40,000 in this work.</p>}},
author = {{Qiu, Dandan and Luo, Lei and Zhao, Zhiqi and Wang, Songtao and Wang, Zhongqi and Sundén, Bengt}},
issn = {{1290-0729}},
keywords = {{Flow structure; Heat transfer; Jet impingement; Pin-fin; Topology analysis}},
language = {{eng}},
publisher = {{Elsevier}},
series = {{International Journal of Thermal Sciences}},
title = {{On heat transfer and flow characteristics of jets impingement on a concave surface with varying pin-fin arrangements}},
url = {{http://dx.doi.org/10.1016/j.ijthermalsci.2021.107163}},
doi = {{10.1016/j.ijthermalsci.2021.107163}},
volume = {{170}},
year = {{2021}},
}