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    Flowfield Investigation of the Effect of Rib Open Area Ratio in a Rectangular Duct

    Source: Journal of Fluids Engineering:;1998:;volume( 120 ):;issue: 003::page 504
    Author:
    Tong-Miin Liou
    ,
    Chih-Wen Kao
    ,
    Shih-Hui Chen
    DOI: 10.1115/1.2820691
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: The spatially periodic turbulent fluid flows and friction in a rectangular passage of width-to-height ratio of 4:1 with perforated rectangular ribs mounted on one wall have been studied using laser Doppler velocimetry and pressure probing. The parameters fixed were rib height to duct hydraulic diameter ratio of 0.106, rib width-to-height ratio of 0.76, rib pitch-to-height ratio of 10, and Reynolds number of 2 × 104 , while the main parameter investigated was the rib open-area ratio (β) with values of 0%, 10%, 22%, 38%, and 44%. Two critical ranges of β and three characteristic flow regimes were identified, which provides useful references of practical tests of computational models. The results also showed that the dominant fluid dynamic factors responsible for the reported peak values of local Nusselt number distribution could be recognized. Moreover, the secondary-flow mean velocity components were found to be one to two orders of magnitude smaller than the bulk mean velocity.
    keyword(s): Ducts , Flow (Dynamics) , Friction , Fluids , Turbulence , Reynolds number , Laser Doppler anemometry , Pressure AND Fluid dynamics ,
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      Flowfield Investigation of the Effect of Rib Open Area Ratio in a Rectangular Duct

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/120610
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    • Journal of Fluids Engineering

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    contributor authorTong-Miin Liou
    contributor authorChih-Wen Kao
    contributor authorShih-Hui Chen
    date accessioned2017-05-08T23:56:55Z
    date available2017-05-08T23:56:55Z
    date copyrightSeptember, 1998
    date issued1998
    identifier issn0098-2202
    identifier otherJFEGA4-27132#504_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/120610
    description abstractThe spatially periodic turbulent fluid flows and friction in a rectangular passage of width-to-height ratio of 4:1 with perforated rectangular ribs mounted on one wall have been studied using laser Doppler velocimetry and pressure probing. The parameters fixed were rib height to duct hydraulic diameter ratio of 0.106, rib width-to-height ratio of 0.76, rib pitch-to-height ratio of 10, and Reynolds number of 2 × 104 , while the main parameter investigated was the rib open-area ratio (β) with values of 0%, 10%, 22%, 38%, and 44%. Two critical ranges of β and three characteristic flow regimes were identified, which provides useful references of practical tests of computational models. The results also showed that the dominant fluid dynamic factors responsible for the reported peak values of local Nusselt number distribution could be recognized. Moreover, the secondary-flow mean velocity components were found to be one to two orders of magnitude smaller than the bulk mean velocity.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleFlowfield Investigation of the Effect of Rib Open Area Ratio in a Rectangular Duct
    typeJournal Paper
    journal volume120
    journal issue3
    journal titleJournal of Fluids Engineering
    identifier doi10.1115/1.2820691
    journal fristpage504
    journal lastpage512
    identifier eissn1528-901X
    keywordsDucts
    keywordsFlow (Dynamics)
    keywordsFriction
    keywordsFluids
    keywordsTurbulence
    keywordsReynolds number
    keywordsLaser Doppler anemometry
    keywordsPressure AND Fluid dynamics
    treeJournal of Fluids Engineering:;1998:;volume( 120 ):;issue: 003
    contenttypeFulltext
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