BOILING FLOW SIMULATIONS FOR DEBORA EXPERIMENT USING EULERIAN CFD APPROACH

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F22%3A00359677" target="_blank" >RIV/68407700:21340/22:00359677 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1615/TFEC2022.mph-ii.041182" target="_blank" >https://doi.org/10.1615/TFEC2022.mph-ii.041182</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1615/TFEC2022.mph-ii.041182" target="_blank" >10.1615/TFEC2022.mph-ii.041182</a>

Result language
angličtina
Original language name
BOILING FLOW SIMULATIONS FOR DEBORA EXPERIMENT USING EULERIAN CFD APPROACH
Original language description
To find an appropriate closure and boiling model for subcooled convective boiling flow, CFD simulations based on an Eulerian approach have been performed for the DEBORA experiment, in which upward flow in a vertical heated pipe with the inner diameter of 19.2 mm and the length of 3.5 m was investigated. We developed a modified zero-closure model, which was implemented into Ansys Fluent® code via user defined functions. The main difference between the original and our zero-closure modified model lies in the modeling of the lift-force coefficient. We focused on four selected experimental cases representing different tendency in void fraction profile at the elevation of the outlet, i. e., higher/lower void at the pipe center than that near the wall region. A grid dependency study was first undertaken, followed by a sensitivity analysis of the liftforce coefficient. The modified model could correctly capture the tendency of the void profile, which was not predicted by the original zero-closure model. This result implies the feasibility of the zero-closure model to accurately estimate the subcooled boiling flow through further improvement of its coefficients.
Czech name
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Czech description
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Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of the 7th Thermal and Fluids Engineering Conference (TFEC)
ISBN
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ISSN
2379-1748
e-ISSN
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Number of pages
10
Pages from-to
1539-1548
Publisher name
American Society of Thermal and Fluids Engineers
Place of publication
Danbury
Event location
Las Vegas, NV
Event date
May 15, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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