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Large Eddy Simulation of Through-Flow Effects on Turbulent Heat Transfer Characteristics in Concentric Annulus With Inner Cylinder Rotation

[+] Author Affiliations
Akihiro Ohsawa, Akira Murata, Kaoru Iwamato

Tokyo University of Agriculture and Technology, Nakacho, Japan

Paper No. AJKFluids2015-03135, pp. V01AT03A004; 7 pages
doi:10.1115/AJKFluids2015-03135
From:
  • ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
  • Volume 1A: Symposia, Part 2
  • Seoul, South Korea, July 26–31, 2015
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5721-3
  • Copyright © 2015 by JSME

abstract

Through-flow effects on turbulent heat transfer in the Taylor-Couette-Poiseuille flow were investigated by using a large eddy simulation. Through-flow Reynolds numbers of 1000 and 4000 under a constant inner-wall rotation speed were examined. Increase of the through-flow Reynolds number caused increase and decrease of the Nusselt numbers at inner and outer walls, respectively. At lower through-flow Reynolds number, the Taylor vortices were observed. On the other hand, at higher through-flow Reynolds number, the Taylor vortices were transformed into streak and spiral-band structures near the inner and outer walls, respectively. These flow structures were clearly visualized by contour surfaces of instantaneous temperature and second invariant of deformation tensor.

Copyright © 2015 by JSME

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