In the present article, we investigate numerically turbulent flow pulsation through compound rectangular channels. RANS, URANS and LES are employed for unsteady turbulence modelling. Strong large-scale quasi-periodic flow oscillations are observed in most of the channels. Such large-scale flow oscillations in compound rectangular channels are similar to the quasi-periodic flow pulsation through the gaps between fuel rod bundle in nuclear reactor. There is a strong peak in the power density spectrum of the axial velocity component. LES gives better predictions for the axial mean velocity distribution than those of URANS. The large scale cross motions through the rectangular compound channels induce significant heat transfer enhancement of the compound channel flow.
|Number of pages
|Published - 2009
|6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009 - Seoul, Korea, Republic of
Duration: 2009 Jun 22 → 2009 Jun 24
|6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009
|Korea, Republic of
|09/6/22 → 09/6/24
Bibliographical noteFunding Information:
This work was supported by grant No. KSC-2009-S01-0006 from Korea Institute of Science and Technology Information.
© 2009 TSFP4 Symposium. All Rights Reserved.
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes