Large-eddy simulation of the high-Reynolds-number flow through a high-aspect-ratio cooling duct

Thomas Kaller, Vito Pasquariello, Stefan Hickel, Nikolaus A. Adams

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

4 Citations (Scopus)
117 Downloads (Pure)

Abstract

We present well-resolved large-eddy-simulations (LES) of a straight, high-aspect-ratio cooling duct (HARCD) at a bulk Reynolds number of Re = 110 • 103 and an average Nusselt number of Nu = 371. The geometry and boundary conditions have been defined together with Rochlitz et al. (2015), who conducted the experimental measurements for this case. Water was chosen as coolant. The current investigation focuses on the influence of asymmetrical wall heating on the flow field and specifically on the influence of the turbulence-induced secondary flow on turbulent heat transfer, the spatial development of the temperature boundary layer and the accompanying viscosity modulation. Due to the viscosity drop in the vicinity of the heated wall we observe a decrease in turbulent length scales and in turbulence anisotropy, resulting in a decrease of turbulent mixing and the secondary flow strength along the duct.

Original languageEnglish
Title of host publication10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
PublisherTSFP
Number of pages6
Volume2
ISBN (Electronic)9780000000002
Publication statusPublished - 2017
Event10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017 - Chicago, United States
Duration: 6 Jul 20179 Jul 2017
Conference number: 10
http://tsfp10.org/

Conference

Conference10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017
Abbreviated titleTSFP 2017
Country/TerritoryUnited States
CityChicago
Period6/07/179/07/17
Internet address

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