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 language | English |
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Title of host publication | 7th European Thermal-Sciences Conference (Eurotherm2016) |
Subtitle of host publication | 19–23 June 2016, Krakow, Poland |
Place of Publication | Bristol, UK |
Publisher | IOP Science |
Number of pages | 9 |
DOIs | |
Publication status | Published - 19 Jun 2016 |
Event | 7th European Thermal-Sciences Conference, Eurotherm 2016 - Krakow, Poland Duration: 19 Jun 2016 → 23 Jun 2016 Conference number: 7 |
Publication series
Name | Journal of Physics: Conference Series |
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Publisher | IOP Science |
Volume | 745 |
ISSN (Print) | 1742-6588 |
ISSN (Electronic) | 1742-6596 |
Conference
Conference | 7th European Thermal-Sciences Conference, Eurotherm 2016 |
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Abbreviated title | Eurotherm |
Country/Territory | Poland |
City | Krakow |
Period | 19/06/16 → 23/06/16 |