Heat transfer augmentation of natural convection heat sink through notched fin design

Muneeshwaran, M.; Tsai, Ming-Kun; Wang, Chi-Chuan

doi:10.1016/j.icheatmasstransfer.2023.106676

Title: Heat transfer augmentation of natural convection heat sink through notched fin design

Journal Article · Fri Feb 17 00:00:00 EST 2023 · International Communications in Heat and Mass Transfer

DOI:https://doi.org/10.1016/j.icheatmasstransfer.2023.106676· OSTI ID:1961939

Muneeshwaran, M. ^[1]; Tsai, Ming-Kun ^[2]; Wang, Chi-Chuan ^[2]

National Yang Ming Chiao Tung University (Taiwan); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
National Yang Ming Chiao Tung University (Taiwan)

A novel notched fin heat sink with a central opening is proposed in the present study to augment the heat transfer performance of the natural convection heat sink under horizontal configuration. Thermal and airflow behavior in the heat sinks were studied using both experimental and numerical methods. The results showed that the performance of the conventional heat sink can be enhanced by optimizing its fin design. The basic heat sink model provided a 17% reduction in thermal resistance when its fin height and fin spacing were doubled, and it was accompanied by a 21% increase in surface area. The heat sink with a notched fin design with a less surface area offered a 13% lower thermal resistance compared to the basic model by entraining more airflow into the interior fin region. Providing a central opening in the notched fin heat sink can further reduce the thermal resistance by about 13%. Further, this study also analyzed the influence of emissivity of the heat sink on natural convection conditions. The findings demonstrated that the heat sink with an emissivity of 0.9 can reduce the thermal resistance by nearly 23% compared to one with an emissivity of 0.15.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE; National Science and Technology Council, Taiwan

Grant/Contract Number:: AC05-00OR22725; 111-2221-E-A49-090-MY3

OSTI ID:: 1961939

Journal Information:: International Communications in Heat and Mass Transfer, Vol. 142; ISSN 0735-1933

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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