Turbulent flow characteristics in a rectangular channel with repeated rib roughness

H. Sato, K. Hishida, M. Maeda

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


The turbulent flow structure over a repeated-rib geometry rough-walled surface was investigated in connection with a two dimensional square rib roughness which was set on the internal surface of a rectangular channel. The upper plate with ribs of the same pitch can be shifted to arbitrary positions. Reynolds number of duct flow was set to 2.0×104, which was similar to the condition of practical heat exchangers. Flow measurements were performed using a compact fiber laser Doppler velocimeter (LDV) probe. The results of the detailed flow measurements indicated that a recirculating flow existed behind the rib on symmetric and staggered rib geometries. A remarkable large peak value of Reynolds shear stress was observed behind the rib on the staggered rib geometry.

Original languageEnglish
Pages (from-to)191-196
Number of pages6
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Publication statusPublished - 1989
EventHeat Transfer in Convective Flows - Philadelphia, PA, USA
Duration: 1989 Aug 61989 Aug 9

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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