Experimental and numerical investigation on a fully developed turbulent pipe flow over a semicircle orifice

S. Okuda, C. H. Lepeut, M. Rasti, T. Kawata, S. Obi

Research output: Contribution to journalConference article


The internal separated flow associated with remarkable mean secondary flow is investigated both experimentally and computationally. The computational investigation indicates that the commercially available RANS model group and LES provide obvious difference in terms of the prediction of the flow reattachment and recovery. On the other hand, some over-proportional magnitude of the velocity fluctuation across the mean flow direction is found by velocity measurement by stereo PIV. The recirculation region in either side of the orifice seems to be the source of the streamwise vortex that governs the development of the flow near the flow reattachment point. The considered flow serves as a useful test case for both RANS modeling and LES.

Original languageEnglish
Pages (from-to)2504-2512
Number of pages9
JournalProceedings of the International Symposium on Turbulence, Heat and Mass Transfer
Publication statusPublished - 2012 Jan 1
Event7th International Symposium On Turbulence, Heat and Mass Transfer, THMT 2012 - Palermo, Italy
Duration: 2012 Sep 242012 Sep 27


ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

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