Characteristics of turbulent flow and heat transfer in a rectangular channel with repeated rib roughness

Hiroshi Sato, Koichi Hishida, Masanobu Maeda

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Characteristics of heat transfer and turbulent flow over a repeated-rib-geometry, roughwalled surface were investigated in connection with a two-dimensional square rib roughness that was put on the top and bottom surfaces in a rectangular channel. The experiments were performed on three types of rib configuration. The duct flow Reynolds number was set at 2.0 × 10 4, which was similar to the condition for practical heat exchanger tubes. Flow measurements were performed using a fiber laser Doppler velocimeter. The results of the detailed flow measurements indicated that a recirculating flow existed behind the rib on symmetric and staggered rib geometries. A remarkably large peak value of Reynolds shear stress was observed behind the rib on the staggered rib geometry. The flow measurements show that the feature of turbulent flow structure was well correlated with the heat transfer characteristics over the ribbed wall.

Original languageEnglish
Pages (from-to)1-16
Number of pages16
JournalExperimental Heat Transfer
Volume5
Issue number1
DOIs
Publication statusPublished - 1992

Fingerprint

flow measurement
Flow measurement
turbulent flow
Turbulent flow
roughness
Surface roughness
heat transfer
Heat transfer
Geometry
laser doppler velocimeters
tube heat exchangers
Laser Doppler velocimeters
surface geometry
Tubes (components)
Reynolds stress
Flow structure
Fiber lasers
geometry
ducts
Ducts

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering
  • Control and Systems Engineering

Cite this

Characteristics of turbulent flow and heat transfer in a rectangular channel with repeated rib roughness. / Sato, Hiroshi; Hishida, Koichi; Maeda, Masanobu.

In: Experimental Heat Transfer, Vol. 5, No. 1, 1992, p. 1-16.

Research output: Contribution to journalArticle

Sato, Hiroshi ; Hishida, Koichi ; Maeda, Masanobu. / Characteristics of turbulent flow and heat transfer in a rectangular channel with repeated rib roughness. In: Experimental Heat Transfer. 1992 ; Vol. 5, No. 1. pp. 1-16.
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