Görtler vortices and their effect on heat transfer in rotating boundary layer

Hiroshi Komiyama, Yoshihiro Edo, Shigeaki Masuda, Shinnosuke Obi

Research output: Contribution to journalArticle

Abstract

This paper reports on the influence of Coriolis force on the heat transfer characteristics in rotating laminar boundary layer. The experiments have been conducted for the mean flow velocity U8=4.0m/s and the angular velocity Ω=4.6 rad/s, and the heat flux has been applied uniformly over the plate. Liquid crystal method is applied to measuring the surface temperature distribution. The results indicate that heat transfer has been enhanced on the pressure surface. The velcity measurements show that Coriolis instability induces the counter-rotating longitudinal vortices which argument the heat transfer from the pressure surface. On the other hand, the heat transfer from the suction surface remains unchanged as compared to the no-rotating case, which is due to the Coriolis force that stabilizes the boundary layer. As a consequence, the averaged heat transfer coefficient is higher on the pressure surface than that on the suction surface and the stationary wall by approximately 40%.

Original languageEnglish
Pages (from-to)768-773
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume66
Issue number643
Publication statusPublished - 2000 Mar

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boundary layers
Boundary layers
Vortex flow
heat transfer
vortices
Heat transfer
suction
Coriolis force
laminar boundary layer
angular velocity
heat transfer coefficients
surface temperature
heat flux
counters
Laminar boundary layer
temperature distribution
flow velocity
liquid crystals
Angular velocity
Flow velocity

Keywords

  • Boundary layer
  • Coriolis force
  • Görtler vortex
  • Heat transfer augmentation
  • Thermal liquid crystal

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics

Cite this

Görtler vortices and their effect on heat transfer in rotating boundary layer. / Komiyama, Hiroshi; Edo, Yoshihiro; Masuda, Shigeaki; Obi, Shinnosuke.

In: Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B, Vol. 66, No. 643, 03.2000, p. 768-773.

Research output: Contribution to journalArticle

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N2 - This paper reports on the influence of Coriolis force on the heat transfer characteristics in rotating laminar boundary layer. The experiments have been conducted for the mean flow velocity U8=4.0m/s and the angular velocity Ω=4.6 rad/s, and the heat flux has been applied uniformly over the plate. Liquid crystal method is applied to measuring the surface temperature distribution. The results indicate that heat transfer has been enhanced on the pressure surface. The velcity measurements show that Coriolis instability induces the counter-rotating longitudinal vortices which argument the heat transfer from the pressure surface. On the other hand, the heat transfer from the suction surface remains unchanged as compared to the no-rotating case, which is due to the Coriolis force that stabilizes the boundary layer. As a consequence, the averaged heat transfer coefficient is higher on the pressure surface than that on the suction surface and the stationary wall by approximately 40%.

AB - This paper reports on the influence of Coriolis force on the heat transfer characteristics in rotating laminar boundary layer. The experiments have been conducted for the mean flow velocity U8=4.0m/s and the angular velocity Ω=4.6 rad/s, and the heat flux has been applied uniformly over the plate. Liquid crystal method is applied to measuring the surface temperature distribution. The results indicate that heat transfer has been enhanced on the pressure surface. The velcity measurements show that Coriolis instability induces the counter-rotating longitudinal vortices which argument the heat transfer from the pressure surface. On the other hand, the heat transfer from the suction surface remains unchanged as compared to the no-rotating case, which is due to the Coriolis force that stabilizes the boundary layer. As a consequence, the averaged heat transfer coefficient is higher on the pressure surface than that on the suction surface and the stationary wall by approximately 40%.

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