Heat transfer from glass melt to cold cap: Computational fluid dynamics study of cavities beneath cold cap
Abstract
Abstract 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.
- Authors:
-
[1];
[1];
[4];
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- USDOE Richland Operations Office, WA (United States). Office of River Protection
- U.S. Department of Energy Office of River Protection Richland WA USA
- Czech Academy of Sciences, Prague (Czech Republic). Inst. of Rock Structure and Mechanics; Univ. of Chemistry and Technology, Prague (Czech Republic). Lab. of Inorganic Materials
- Publication Date:
- Research Org.:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Org.:
- USDOE Office of Nuclear Energy (NE)
- OSTI Identifier:
- 1784557
- Alternate Identifier(s):
- OSTI ID: 1804959
- Report Number(s):
- INL/JOU-18-52200-Rev000
Journal ID: ISSN 2041-1286; TRN: US2210207
- Grant/Contract Number:
- AC07-05ID14517; 19-14179S; DE‐AC07‐05ID14517
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal of Applied Glass Science
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: 2; Journal ID: ISSN 2041-1286
- Publisher:
- American Ceramic Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 97 MATHEMATICS AND COMPUTING; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; Vitrification; Computational fluid dynamics; Cold cap; Cavity layer; Waste glass melter
Citation Formats
Abboud, Alexander W., Guillen, Donna P., Hrma, Pavel, Kruger, Albert A., Klouzek, Jaroslav, and Pokorny, Richard. Heat transfer from glass melt to cold cap: Computational fluid dynamics study of cavities beneath cold cap. United States: N. p., 2021.
Web. doi:10.1111/ijag.15863.
Abboud, Alexander W., Guillen, Donna P., Hrma, Pavel, Kruger, Albert A., Klouzek, Jaroslav, & Pokorny, Richard. Heat transfer from glass melt to cold cap: Computational fluid dynamics study of cavities beneath cold cap. United States. https://doi.org/10.1111/ijag.15863
Abboud, Alexander W., Guillen, Donna P., Hrma, Pavel, Kruger, Albert A., Klouzek, Jaroslav, and Pokorny, Richard. Mon .
"Heat transfer from glass melt to cold cap: Computational fluid dynamics study of cavities beneath cold cap". United States. https://doi.org/10.1111/ijag.15863. https://www.osti.gov/servlets/purl/1784557.
@article{osti_1784557,
title = {Heat transfer from glass melt to cold cap: Computational fluid dynamics study of cavities beneath cold cap},
author = {Abboud, Alexander W. and Guillen, Donna P. and Hrma, Pavel and Kruger, Albert A. and Klouzek, Jaroslav and Pokorny, Richard},
abstractNote = {Abstract 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.},
doi = {10.1111/ijag.15863},
journal = {International Journal of Applied Glass Science},
number = 2,
volume = 12,
place = {United States},
year = {Mon Jan 04 00:00:00 EST 2021},
month = {Mon Jan 04 00:00:00 EST 2021}
}
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