Flow and Temperature Fields in Cooling Devices with Embedded Serpentine Tubes

Karathanassis, I. K., Papanicolaou, E., Belessiotis, V. & Bergeles, G. (2014). Flow and Temperature Fields in Cooling Devices with Embedded Serpentine Tubes. Numerical Heat Transfer, Part A: Applications, 66(4), pp. 349-378. doi: 10.1080/10407782.2014.884864

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Abstract

The turbulent flow (Re = 5124) and conjugate heat transfer in heat-sink designs of the tube-on-plate type are numerically investigated. The cooling configurations employ a serpentine tube partially (or fully) embedded inside the plate. Two-and four-pass configurations are investigated. A constant heat flux is applied at the bottom surface of the heat-sink plate. The SST k-ω model is used for the prediction of the turbulent flow and heat transfer. Two pairs of longitudinal vortices, as well as secondary flow separation, have been found to set in at the tube curved section. The combined secondary flow pattern enhances heat transfer at the tube sections over a considerable distance downstream of the 180° bends. In the last part of the analysis, the overall performance of the two configurations is compared using a number of evaluation criteria suitable for heat exchanging devices. The four-pass configuration with fully embedded tubing exhibits the best thermal (energetic) and exergetic performance.

Item Type: Article
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in Numerical Heat Transfer, Part A Applications on 4 Jun 2014, available online: http://www.tandfonline.com/10.1080/10407782.2014.884864
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: School of Engineering & Mathematical Sciences > Engineering
URI: http://openaccess.city.ac.uk/id/eprint/18285

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