Numerical investigation of turbulent flow pulsation in compound rectangular channels

Seong Ho Hong, Jeong Sik Seo, Jong Kuen Shin, Young Don Choi

Research output: Contribution to conferencePaper

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages511-516
Number of pages6
Publication statusPublished - 2009
Event6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009 - Seoul, Korea, Republic of
Duration: 2009 Jun 222009 Jun 24

Other

Other6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009
CountryKorea, Republic of
CitySeoul
Period09/6/2209/6/24

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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  • Cite this

    Hong, S. H., Seo, J. S., Shin, J. K., & Choi, Y. D. (2009). Numerical investigation of turbulent flow pulsation in compound rectangular channels. 511-516. Paper presented at 6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009, Seoul, Korea, Republic of.