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

M. Muneeshwaran, Ming Kun Tsai, Chi Chuan Wang

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

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%. 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.

Original languageEnglish
Article number106676
JournalInternational Communications in Heat and Mass Transfer
Volume142
DOIs
StatePublished - Mar 2023

Funding

The authors greatly appreciate the financial aid from the National Science and Technology Council , Taiwan under the contract 111-2221-E-A49-090-MY3 .

FundersFunder number
National Science and Technology Council111-2221-E-A49-090-MY3

    Keywords

    • Electronic cooling
    • Heat sink
    • Natural convection
    • Notched fin
    • Thermal resistance

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