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Open AccessArticle

Heat Transfer Enhancement by Shot Peening of Stainless Steel

1
Department of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, 123 Moo 16 Mittraphap Rd., Nai-Muang, Muang, Khon Kaen 40002, Thailand
2
National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand
3
Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(6), 584; https://doi.org/10.3390/coatings10060584
Received: 2 May 2020 / Revised: 16 June 2020 / Accepted: 19 June 2020 / Published: 23 June 2020
(This article belongs to the Section Surface Characterization, Deposition and Modification)
In heat exchange applications, the heat transfer efficiency could be improved by surface modifications. Shot peening was one of the cost-effective methods to provide different surface roughness. The objectives of this study were (1) to investigate the influences of the surface roughness on the heat transfer performance and (2) to understand how the shot peening process parameters affect the surface roughness. The considered specimens were 316L stainless steel hollow tubes having smooth and rough surfaces. The computational fluid dynamics (CFD) simulation was used to observe the surface roughness effects. The CFD results showed that the convective heat transfer coefficients had linear relationships with the peak surface roughness (Rz). Finite element (FE) simulation was used to determine the effects of the shot peening process parameters. The FE results showed that the surface roughness was increased at higher sandblasting speeds and sand diameters. View Full-Text
Keywords: heat transfer; shot peening; stainless steel; surface roughness heat transfer; shot peening; stainless steel; surface roughness
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MDPI and ACS Style

Koowattanasuchat, P.; Mahayotsanun, N.; Sucharitpwatskul, S.; Mahabunphachai, S.; Dohda, K. Heat Transfer Enhancement by Shot Peening of Stainless Steel. Coatings 2020, 10, 584.

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