Flow destabilization and heat transfer augmentation in an array of grooved passages with developing flow

John Akerley, Miles Greiner, Aleksandr Obabko, Paul Fischer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the current work, two-dimensional spectral element simulations are used to investigate the heat transfer and fan power performance of the developing regions of finite-length, grooved channel passage arrays, including the accelerating and decelerating flows entering and exiting the arrays. The performance of the grooved channel arrays is compared with that of flat passage arrays with the same average wall center-to-center spacing for Reynolds numbers ranging from 1000 to 3000. The simulations show that unsteadiness develops after a number of groove lengths and results in enhanced heat transfer. The unsteadiness improves the overall heat transfer compared with a flat passage array of equal average channel height by a factor of 1.46 at Re = 1000 and a factor of 2.75 at Re = 3000. The grooves also cause an increase in the required fan power by a factor of 8.56 at Re = 1000 and a factor of 18.10 at Re = 3000. Since past simulations have shown that three-dimensional simulations are necessary to accurately predict heat transfer and fan power performance in transversely grooved passages, the current two-dimensional results will be used as a starting point for a three-dimensional model that will ultimately be used to predict heat transfer and friction factor performance in developing grooved channel flows.

Original languageEnglish (US)
Title of host publicationASME 2012 Heat Transfer Summer Conf. Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
Pages651-658
Number of pages8
DOIs
StatePublished - 2012
Externally publishedYes
EventASME 2012 Heat Transfer Summer Conference Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012 - Rio Grande, Puerto Rico
Duration: Jul 8 2012Jul 12 2012

Publication series

NameASME 2012 Heat Transfer Summer Conf. Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
Volume1

Other

OtherASME 2012 Heat Transfer Summer Conference Collocated with the ASME 2012 Fluids Engineering Div. Summer Meeting and the ASME 2012 10th Int. Conf. on Nanochannels, Microchannels and Minichannels, HT 2012
CountryPuerto Rico
CityRio Grande
Period7/8/127/12/12

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Condensed Matter Physics

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