Modeling Heat Transfer in Cylindrical Batteries: Spiral-Based Thermal Conductivity Tensor
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Date
2025-01-30
Authors
Hvožďa, Jiří
Boháček, Jan
Vakhrushev, Alexander
Karimi-Sibaki, Ebrahim
0000-0002-4444-4485Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Avestia Publishing
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Abstract
This study investigates the importance of considering the well-known spiral structure of cylindrical batteries in numerical models of heat transfer. Such models typically simplify the internal geometry by a concentric layout of electrodes and separators, resulting in an effective orthotropic thermal conductivity with radial, tangential, and axial components defined in a cylindrical coordinate system. However, the actual spiral structure suggests radius-dependent thermal conductivity. In this study, several thermal simulations were performed, comparing thermal fields obtained with the commonly used cylindrical orthotropy and a more realistic spiral structure. The results show that the spiral structure has a negligible effect on the overall temperature distribution for configurations with dense spirals and higher radial thermal conductivity (2 W·m1·K1). However, for lower radial thermal conductivity (0.2 W·m1·K1), considerable errors were observed even for dense spirals. These findings emphasize the need for studies to justify simplifications made in the thermal conductivity tensor.
Description
Citation
Journal of Fluid Flow, Heat and Mass Transfer. 2025, vol. 12, issue 1, p. 23-28.
https://jffhmt.avestia.com/2025/PDF/003.pdf
https://jffhmt.avestia.com/2025/PDF/003.pdf
Document type
Peer-reviewed
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Published version
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Language of document
en