Direct numerical simulations of flow and heat transfer over a circular cylinder at Re = 2000

Mahening Citra Vidya, N.A. Beishuizen, Theodorus H. van der Meer

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Abstract

Unsteady direct numerical simulations of the flow around a circular cylinder have been performed at Re = 2000. Both two-dimensional and three-dimensional simulations were validated with laminar cold flow simulations and experiments. Heat transfer simulations were carried out and the time-averaged local Nusselt number at the cylinder surface was obtained for various Reynolds numbers. Finally, the heat transfer of 2D and 3D simulations are compared. The average Nusselt numbers were found to be in accordance with empirical correlations. The 3D simulation gives a higher heat transfer due to the captured effects of motions in the spanwise direction compared to the 2D simulation. The irregular fluctuation of surface-averaged Nusselt number can be captured by the 3D simulation, while 2D simulation results show a regular fluctuation corresponding to the shedding from the cylinder, similar to that of a laminar flow.
Original languageEnglish
Title of host publication7th European Thermal-Sciences Conference (Eurotherm2016)
Subtitle of host publication19–23 June 2016, Krakow, Poland
Place of PublicationBristol, UK
PublisherIOP Science
Number of pages9
DOIs
Publication statusPublished - 19 Jun 2016
Event7th European Thermal-Sciences Conference, Eurotherm 2016 - Krakow, Poland
Duration: 19 Jun 201623 Jun 2016
Conference number: 7

Publication series

NameJournal of Physics: Conference Series
PublisherIOP Science
Volume745
ISSN (Print)1742-6588
ISSN (Electronic)1742-6596

Conference

Conference7th European Thermal-Sciences Conference, Eurotherm 2016
Abbreviated titleEurotherm
CountryPoland
CityKrakow
Period19/06/1623/06/16

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