Laser treatment of surfaces for pool boiling heat transfer enhancement
Authors:
- Łukasz J. Orman,
- Norbert Radek,
- Jacek Pietraszek,
- Janusz Wojtkowiak,
- Marcin Szczepaniak
Abstract
The laser treatment of surfaces enables the alteration of their morphology and makes them suitable for various applications. This paper discusses the use of a laser beam to develop surface features that enhance pool boiling heat transfer. Two types of structures (in the ‘macro’ and ‘micro’ scale) were created on the samples: microfins (grooves) and surface roughness. The impact of the pulse duration and scanning velocity on the height of the microfins and surface roughness at the bottom of the grooves was analyzed with a high precision optical profilometer and microscope. The results indicated that the highest microfins and surface roughness were obtained with a pulse duration of 250 ns and scanning velocity of 200 mm/s. In addition, the influence of the ‘macro’ and ‘micro’ scale modifications on the boiling heat transfer of distilled water and ethyl alcohol was studied on horizontal samples heated with an electric heater. The largest enhancement was obtained for the highest microfins and roughest surfaces, especially at small superheats. Heat flux dissipated from the samples containing microfins of 0.4 mm height was, maximally, over three times (for water) and two times (for ethanol) higher than for the samples with smaller microfins (0.2 mm high). Thus, a modification of a selected model of boiling heat transfer was developed so that it would be applicable to laser-processed surfaces. The correlation proved to be quite successful, with almost all experimental data falling within the ±100% agreement bands.
- Record ID
- CUTe1766b9818fc4ea590caf3dfc99afc17
- Publication categories
- ;
- Author
- Journal series
- Materials, ISSN , e-ISSN 1996-1944, Biweekly
- Issue year
- 2023
- Vol
- 16
- No
- 4
- Pages
- [1-21]
- Article number
- 1365
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 19-21; Bibliografia (liczba pozycji) - 44; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 16, Iss. 4
- Substantive notes
- This article belongs to the Special Issue "Laser Treatment for Surface Layers"
- Keywords in English
- boiling, heat transfer enhancement, laser beam, surface treatment
- ASJC Classification
- DOI
- DOI:10.3390/ma16041365 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1944/16/4/1365 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTe1766b9818fc4ea590caf3dfc99afc17/
- URN
urn:pkr-prod:CUTe1766b9818fc4ea590caf3dfc99afc17
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.