EXPERIMENTAL STUDY ON HEAT TRANSFER PERFORMANCE AND FLOW VISUALIZATION IN MICROCHANNELS WITH MICROPILLARS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F22%3APU147609" target="_blank" >RIV/00216305:26210/22:PU147609 - isvavai.cz</a>

Result on the web

<a href="http://www.doiserbia.nb.rs/img/doi/0354-9836/2022/0354-98362205169Y.pdf" target="_blank" >http://www.doiserbia.nb.rs/img/doi/0354-9836/2022/0354-98362205169Y.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2298/TSCI2205169Y" target="_blank" >10.2298/TSCI2205169Y</a>

Result language

angličtina

Original language name

EXPERIMENTAL STUDY ON HEAT TRANSFER PERFORMANCE AND FLOW VISUALIZATION IN MICROCHANNELS WITH MICROPILLARS

Original language description

This research investigated heat transfer performance and flow characteristics of three polydimethylsiloxane microchannels full of deionised water as a working fluid. A single micropillar, horizontal micropillars, and vertical micropillars along the flow direction were prepared on the microchannels experimentally. Re-sults show that the Nusselt number of microchannels with two horizontal mi-cropillars is 19% higher than that with a single micropillar. The microchannel with two vertical micropillars has the Nusselt number is 29% higher than that with a single micropillar, which shows the best performance on the heat transfer enhancement. Visualization experiments of the flow field were carried out to ex-plore the enhanced mechanism of the heat transfer for microchannels with vari-ous micropillar arrangements. When the flow rate is 7 mLpm, the maximum ve-locities near the single cylinder and the horizontal micro-column are 0.5 m/s and 0.52 m/s. Fluid velocity in a region between two vertical micropillars reaches 0.72 m/s when the flow rate is 7 mLpm. The fluid in the high-speed region is fully mixed around the micropillar, which reduces the stagnation region area down-stream of the vertical micropillar and enhances heat transfer. © 2022 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

20704 - Energy and fuels

Project

<a href="/en/project/EF15_003%2F0000456" target="_blank" >EF15_003/0000456: Sustainable Process Integration Laboratory (SPIL)</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Thermal Science

ISSN

0354-9836

e-ISSN

2334-7163

Volume of the periodical

5

Issue of the periodical within the volume

25

Country of publishing house

RS - THE REPUBLIC OF SERBIA

Number of pages

10

Pages from-to

4169-4178

UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-85140617242