Heat transfer from glass melt to cold cap: Computational fluid dynamics study of cavities beneath cold cap

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43923510" target="_blank" >RIV/60461373:22310/21:43923510 - isvavai.cz</a>
Alternative codes found
RIV/67985891:_____/21:00541193
Result on the web
<a href="https://ceramics.onlinelibrary.wiley.com/doi/10.1111/ijag.15863" target="_blank" >https://ceramics.onlinelibrary.wiley.com/doi/10.1111/ijag.15863</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1111/ijag.15863" target="_blank" >10.1111/ijag.15863</a>

Result language
angličtina
Original language name
Heat transfer from glass melt to cold cap: Computational fluid dynamics study of cavities beneath cold cap
Original language description
Efficient glass production depends on the continuous supply of heat from the glass melt to the floating layer of batch, or cold cap. Computational fluid dynamics (CFD) are employed to investigate the formation and behavior of gas cavities that form beneath the batch by gases released from the collapsing primary foam bubbles, ascending secondary bubbles, and in the case of forced bubbling, from the rising bubbling gas. The gas phase fraction, temperature, and velocity distributions below the cold cap are used to calculate local and average heat transfer rates as a function of the bubbling rate. It is shown that the thickness of the cavities is nearly independent of the cold cap shape and the amount of foam evolved during batch conversion. It is ~7 mm and up to ~15 mm for the cases without and with forced bubbling used to promote circulation within the melt, respectively. Using computed velocity and temperature profiles, the melting rate of the simulated high-level nuclear waste glass batch was estimated to increase with the bubbling rate to the power of ~0.3 to 0.9, depending on the flow pattern. The simulation results are in good agreement with experimental data from laboratory- and pilot-scale melter tests.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20504 - Ceramics

Project
<a href="/en/project/GA19-14179S" target="_blank" >GA19-14179S: In-situ analysis of foam layer behavior at the batch-melt interface using laboratory-scale melter vessel</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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