Heat transfer enhancement in a pipe, using a flow inverter

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F09%3A00158946" target="_blank" >RIV/68407700:21220/09:00158946 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Heat transfer enhancement in a pipe, using a flow inverter
Original language description
Flow inversion, transferring a liquid from the wall region towards the center of the pipe improves heat transfer in the laminar flow regime. Two original flow inverter designs were tested in a long pipe (3m in length) heated by condensing steam, using starch molasses as a working medium. Experiments carried out in the range of Reynolds number 4 - 60 and Graetz number 150 - 700 resulted in an increase of 20 - 35% in the heat transfer coefficient, accompanied by a 30-40% increase in the pressure drop. Theexperimental results confirm the numerical model prediction (within an extended Reynolds number range starting from Re=0.1). Thus an almost 40% increase in heat transfer can be expected at the optimal Graetz number in the range 50-100, using only one flow inverter located in the middle of a sufficiently long pipe.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BK - Liquid mechanics
OECD FORD branch
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Project
<a href="/en/project/GA101%2F06%2F0535" target="_blank" >GA101/06/0535: Thermal processing of biodegradable materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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