Experimental investigation of heat transfer and friction characteristics in a circular tube fitted with V-nozzle turbulators

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dc.contributor.authorEiamsa-ard, S.
dc.contributor.authorPromvonge, P.
dc.date.accessioned2026-08-06T09:54:11Z
dc.date.available2026-08-06T09:54:11Z
dc.date.issued2006-05-01
dc.description.abstractThe effects of V-nozzle inserts on heat transfer and friction characteristics in a uniform heat flux tube are experimentally studied. Three different pitch ratios (PR) of V-nozzle arrangements in the test tube are introduced with PR = 2.0, 4.0, and 7.0, in each run. The results of experimental investigations of heat transfer, friction characteristic and enhancement efficiency are presented. It is found that using the V-nozzle can help to increase considerably the heat transfer rate at about 270% over the plain tube. A maximum gain of 1.19 on enhancement efficiency is obtained for the smallest pitch ratio used, PR = 2.0. This indicates that the effect of the reverse/re-circulation flows can improve the heat transfer rate in the tube. In addition, correlations from the results are presented. © 2006 Elsevier Ltd. All rights reserved.
dc.identifier.citationInternational Communications in Heat and Mass Transfer, 33(5), 591-600, 2006
dc.identifier.doi10.1016/j.icheatmasstransfer.2006.02.022
dc.identifier.issn07351933
dc.identifier.other2-s2.0-33646269714
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/1308
dc.sourceInternational Communications in Heat and Mass Transfer
dc.subjectHeat transfer enhancement
dc.subjectRe-circulation/Reverse flow
dc.subjectTurbulator
dc.subjectV-nozzle
dc.titleExperimental investigation of heat transfer and friction characteristics in a circular tube fitted with V-nozzle turbulators
dc.typeArticle

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