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Volume 33, Issue 4
Modeling Thermal Regulation in Thin Vascular Systems: A Mathematical Analysis

Kalyana B. Nakshatrala

Commun. Comput. Phys., 33 (2023), pp. 1035-1068.

Published online: 2023-05

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  • Abstract

Mimicking vascular systems in living beings, designers have realized microvascular composites to achieve thermal regulation and other functionalities, such as electromagnetic modulation, sensing, and healing. Such material systems avail circulating fluids through embedded vasculatures to accomplish the mentioned functionalities that benefit various aerospace, military, and civilian applications. Although heat transfer is a mature field, control of thermal characteristics in synthetic microvascular systems via circulating fluids is new, and a theoretical underpinning is lacking. What will benefit designers are predictive mathematical models and an in-depth qualitative understanding of vascular-based active cooling/heating. So, the central focus of this paper is to address the remarked knowledge gap. First, we present a reduced-order model with broad applicability, allowing the inlet temperature to differ from the ambient temperature. Second, we apply mathematical analysis tools to this reduced-order model and reveal many heat transfer properties of fluid-sequestered vascular systems. We derive point-wise properties (minimum, maximum, and comparison principles) and global properties (e.g., bounds on performance metrics such as the mean surface temperature and thermal efficiency). These newfound results deepen our understanding of active cooling/heating and propel the perfecting of thermal regulation systems.

  • AMS Subject Headings

35B50, 35B51, 35Q79

  • Copyright

COPYRIGHT: © Global Science Press

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@Article{CiCP-33-1035, author = {Nakshatrala , Kalyana B.}, title = {Modeling Thermal Regulation in Thin Vascular Systems: A Mathematical Analysis}, journal = {Communications in Computational Physics}, year = {2023}, volume = {33}, number = {4}, pages = {1035--1068}, abstract = {

Mimicking vascular systems in living beings, designers have realized microvascular composites to achieve thermal regulation and other functionalities, such as electromagnetic modulation, sensing, and healing. Such material systems avail circulating fluids through embedded vasculatures to accomplish the mentioned functionalities that benefit various aerospace, military, and civilian applications. Although heat transfer is a mature field, control of thermal characteristics in synthetic microvascular systems via circulating fluids is new, and a theoretical underpinning is lacking. What will benefit designers are predictive mathematical models and an in-depth qualitative understanding of vascular-based active cooling/heating. So, the central focus of this paper is to address the remarked knowledge gap. First, we present a reduced-order model with broad applicability, allowing the inlet temperature to differ from the ambient temperature. Second, we apply mathematical analysis tools to this reduced-order model and reveal many heat transfer properties of fluid-sequestered vascular systems. We derive point-wise properties (minimum, maximum, and comparison principles) and global properties (e.g., bounds on performance metrics such as the mean surface temperature and thermal efficiency). These newfound results deepen our understanding of active cooling/heating and propel the perfecting of thermal regulation systems.

}, issn = {1991-7120}, doi = {https://doi.org/10.4208/cicp.OA-2022-0240}, url = {http://global-sci.org/intro/article_detail/cicp/21668.html} }
TY - JOUR T1 - Modeling Thermal Regulation in Thin Vascular Systems: A Mathematical Analysis AU - Nakshatrala , Kalyana B. JO - Communications in Computational Physics VL - 4 SP - 1035 EP - 1068 PY - 2023 DA - 2023/05 SN - 33 DO - http://doi.org/10.4208/cicp.OA-2022-0240 UR - https://global-sci.org/intro/article_detail/cicp/21668.html KW - Thermal regulation, vascular systems, reduced-order modeling, maximum and comparison principles, mathematical analysis, efficiency. AB -

Mimicking vascular systems in living beings, designers have realized microvascular composites to achieve thermal regulation and other functionalities, such as electromagnetic modulation, sensing, and healing. Such material systems avail circulating fluids through embedded vasculatures to accomplish the mentioned functionalities that benefit various aerospace, military, and civilian applications. Although heat transfer is a mature field, control of thermal characteristics in synthetic microvascular systems via circulating fluids is new, and a theoretical underpinning is lacking. What will benefit designers are predictive mathematical models and an in-depth qualitative understanding of vascular-based active cooling/heating. So, the central focus of this paper is to address the remarked knowledge gap. First, we present a reduced-order model with broad applicability, allowing the inlet temperature to differ from the ambient temperature. Second, we apply mathematical analysis tools to this reduced-order model and reveal many heat transfer properties of fluid-sequestered vascular systems. We derive point-wise properties (minimum, maximum, and comparison principles) and global properties (e.g., bounds on performance metrics such as the mean surface temperature and thermal efficiency). These newfound results deepen our understanding of active cooling/heating and propel the perfecting of thermal regulation systems.

Nakshatrala , Kalyana B.. (2023). Modeling Thermal Regulation in Thin Vascular Systems: A Mathematical Analysis. Communications in Computational Physics. 33 (4). 1035-1068. doi:10.4208/cicp.OA-2022-0240
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