Numerical analysis and parametric optimization on flow and heat transfer of a microchannel with longitudinal vortex generators
Authors:
- Jian-Fei Zhang,
- Long Jia,
- Wei-Wei Yang,
- Jan Taler,
- Paweł Ocłoń
Abstract
In this paper, a three dimensional (3D) numerical model of a rectangular microchannel with longitudinal vortex generators (LVGs) is developed. The impacts of length, width, longitudinal spacing, and number of LVG pairs are discussed. To improve the flow and heat-transfer performance, the Taguchi method is employed for optimization. Three evaluation indexes—Nusselt number (Nu), Fanning friction factor (f), and overall efficiency (η)—are selected. The analysis of the influence degree of the geometric parameters of LVGs are carried out by intuitive analysis of the Taguchi method results, and the optimum combinations of geometric parameters are also determined. Also, the second-order dimensionless correlations involving multiple impact factors are obtained through response surface analysis. Results show that the number and longitudinal spacing of LVG pairs are the main impact factors for Nu. Regarding the flow resistance, the number and length of LVGs have a much stronger influence than other parameters. Two optimum combinations for Nu and overall efficiency are acquired, which achieve a 23.6% and 7.2% increase for Nu and overall efficiency, respectively, compared with the original model. The maximum differences between the correlations and test models are less than 15% for all of the evaluation indexes. The present investigation can be beneficial for the design and optimization of LVGs-enhanced microchannel heat sinks.
- Record ID
- CUT4988a98d637440c99aad5ad8696fe984
- Publication categories
- ;
- Author
- Journal series
- International Journal of Thermal Sciences, ISSN 1290-0729, e-ISSN 1778-4166
- Issue year
- 2019
- Vol
- 141
- Pages
- 211-221
- Other elements of collation
- il. (w tym kolor.); Bibliografia (na s.) - 220-221; Bibliografia (liczba pozycji) - 35; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 141
- Keywords in English
- heat-transfer enhancement, longitudinal vortex generators, microchannel, optimization, second-order multiple regression model, taguchi method
- DOI
- DOI:10.1016/j.ijthermalsci.2019.03.036 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S1290072918319057 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 140
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT4988a98d637440c99aad5ad8696fe984/
- URN
urn:pkr-prod:CUT4988a98d637440c99aad5ad8696fe984
* 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.