Scopus
Direct numerical simulation of turbulent heat transfer in a wall-normal rotating channel flow
International Journal of Heat and Fluid Flow · Aralık 2019
Makale Bilgileri
DergiInternational Journal of Heat and Fluid Flow
Yayın TarihiAralık 2019
Cilt / Sayfa80
Scopus ID2-s2.0-85074524160
Özet
Investigations into the characteristics of turbulent heat transfer and coherent flow structures in a plane-channel subjected to wall-normal system rotation are conducted using direct numerical simulation (DNS). In order to investigate the influence of system rotation on the temperature field, a wide range of rotation numbers are tested, with the flow pattern transitioning from being fully turbulent to being quasilaminar, and eventually, fully laminar. In response to the Coriolis force, secondary flows appear as large vortical structures, which interact intensely with the wall shear layers and have a significant impact on the distribution of turbulence kinetic energy (TKE), turbulence scalar energy (TSE), temperature statistics, and turbulent heat fluxes. The characteristic length scales of turbulence structures responsible for the transport of TSE are the largest at the quasilaminar state, which demands a very large computational domain in order to capture the two-dimensional spectra of temperature fluctuations. The effects of the Coriolis force on the turbulent transport processes of the temperature variance and turbulent heat fluxes are thoroughly examined in terms of their respective budget balances.
Yazarlar (2)
1
Cale Bergmann
2
Bing Chen Wang
Anahtar Kelimeler
Channel flow
Direct numerical simulation
Heat transfer
Rotating flow
Turbulence
Kurumlar
Defence Research and Development Canada
Ottawa Canada
University of Manitoba
Winnipeg Canada
Metrikler
8
Atıf
2
Yazar
5
Anahtar Kelime