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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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