THERMAL SCIENCE

International Scientific Journal

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Khudheyer S. Mushatet

,

Sarah Nashee

EXPERIMENTAL AND COMPUTATIONAL INVESTIGATION FOR 3-D DUCT FLOW WITH MODIFIED ARRANGEMENT RIBS TURBULATORS

ABSTRACT
A combined numerical and experimental study is conducted to test the heat transfer enhancement and friction factor characteristics for a rectangular duct fitted with three cases of ribs turbulators: continuous ribs, intermittent-continuous-intermittent ribs, and intermittent ribs. Experiments are conducted within a turbulent flow for Reynolds numbers values varied from 10000 to 35000, pitch ratio equal to 5 and height ratio of 0.33. The numerical study carried out using ANSYS FlUENT17.2. The turbulence is modeled by using k-ɛ model. The results showed that the case of intermittent ribs provide the highest over performance factor while the continuous ribs indicate less overall performance factor among the considered cases. In addition, the results show that the highest values of the friction factor are marked from the case of intermittent ribs and then the case of intermittent-continuous-intermittent ribs followed by continuous rib case. The continuous rib case showed the lowest friction factor.
KEYWORDS
ribs turbulators, turbulent flow, overall performance
PAPER SUBMITTED: 2019-08-13
PAPER REVISED: 2020-02-15
PAPER ACCEPTED: 2020-02-21
PUBLISHED ONLINE: 2020-03-08
DOI REFERENCE: https://doi.org/10.2298/TSCI190813093M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 3, PAGES [1653 - 1663]
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Experimental and computational investigation for 3-D duct flow with modified arrangement ribs turbulators

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence