DNS of heat transfer reduction in viscoelastic turbulent channel flows

Kyoungyoun Kim, Radhakrishna Sureshkumar

Research output: Contribution to conferencePaper

1 Scopus citations

Abstract

A direct numerical simulation (DNS) of viscoelastic turbulent channel flow with the FENE-P model was carried out to investigate turbulent heat transfer mechanism of polymer drag-reduced flows. The configuration was a fully-developed turbulent channel flow with uniform heat flux imposed on both walls. The temperature was considered as a passive scalar. The Reynolds number based on the friction velocity (ut) and channel half height (d) is 125 and Prandtl number is 5. Consistently with the previous experimental observations, the present DNS results show that the heat-transfer coefficient was reduced at a rate faster than the accompanying drag reduction rate. Statistical quantities such as root-mean-square temperature fluctuations and turbulent heat fluxes were obtained and compared with those of a Newtonian fluid flow. Budget terms of the turbulent heat fluxes were also presented.

Original languageEnglish (US)
StatePublished - Jan 1 2015
EventASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015 - Seoul, Korea, Republic of
Duration: Jul 26 2015Jul 31 2015

Other

OtherASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015
CountryKorea, Republic of
CitySeoul
Period7/26/157/31/15

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ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Kim, K., & Sureshkumar, R. (2015). DNS of heat transfer reduction in viscoelastic turbulent channel flows. Paper presented at ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015, Seoul, Korea, Republic of.