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Visual and quantitative investigation on heat flow performance from heat sinks using digital holographic interferometer
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Paper Abstract

This paper presents the visual and quantitative investigations on the heat flow performance from plate fin heat sinks using digital holographic interferometry (DHI). In the experiment, double exposure DHI is used to calculate the temperature distribution surrounding the heat sink. First, a digital hologram of ambient air surrounding heat sink is recorded; when no power is applied across the load resistor connected to the bottom of the heat sink. After that, a series of holograms of hot air surrounding the heat sinks are recorded at a constant time interval. The phase difference maps between the heated air and ambient air at different time interval around the heat sink are calculated by numerical method. Visual inspection of reconstructed phase difference maps of air field surrounding the heat sink at a different time provide the qualitative information of temperature variation trend of air field surrounding the heat sink during the heat dissipation process. Quantitative information of temperature distribution surrounding the heat sink is obtained from the relationship between the digitally reconstructed phase difference map of ambient air and heated air. The effect of the number of channels/fin spacing on the heat flow performance of heat sink with equal width and length is also investigated. Experimental data is used to calculate the heat transfer parameters such as local heat flux and convective heat transfer coefficients.

Paper Details

Date Published: 18 November 2019
PDF: 8 pages
Proc. SPIE 11188, Holography, Diffractive Optics, and Applications IX, 111881C (18 November 2019); doi: 10.1117/12.2537516
Show Author Affiliations
Varun Kumar, Indian Institute of Technology Delhi (India)
Chandra Shakher, Indian Institute of Technology Delhi (India)


Published in SPIE Proceedings Vol. 11188:
Holography, Diffractive Optics, and Applications IX
Yunlong Sheng; Changhe Zhou; Liangcai Cao, Editor(s)

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