Experimental study on the heat dissipation performance of straight and oblique fin heat sinks made of thermal conductive composite polymers. (1st May 2021)

• Record Type: Journal Article
• Authors: Timbs, Kalen; Khatamifar, Mehdi; Antunes, Elsa; Lin, Wenxian
• Is Part Of: Thermal science and engineering progress. Volume 22(2021)
• Publication Date: 2021-05-01
• Subjects: Thermally conductive polymer -- Heat sink -- Straight fin -- Oblique fin -- Heat dissipation -- Forced convection; Heat engineering -- Periodicals; Heat engineering; Thermodynamics; Periodicals; 621.402
• DOI: 10.1016/j.tsep.2021.100848
• Languages: English
• ISSNs: 2451-9049

Abstract

Highlights: Straight and oblique fin heat sinks made of composite polymers are investigated. Effect of geometry, flow speed and materials are studied and discussed. Heat sinks made of carbon filled filament are much superior in heat dissipation. Oblique fins provide smaller pressure drops and reduces the thermal resistance. Abstract: Heat sink can effectively dissipate heat in a range of thermal applications for improved performance and reliability. Thermally conductive polymer composites show great promise in solving the overheating issue in electronic devices. This experimental study investigates the heat dissipation performance of straight and oblique fin heat sinks made of thermally conductive polymer composites under forced convection conditions over 7.45 × 10 4 ⩽ Re ⩽ 3.60 × 10 5, where Re is the Reynolds number. The heat sinks were 3D printed using Ice9 Flex (carbon filled polymer), copper filled filament (polylactic acid with 80 wt% copper particles) and bronze filled filament (polylactic acid with 80 wt% bronze particles), respectively. Oblique fins were found to effectively reduce the thermal resistance of heat sinks, increase the convective heat transfer and the inner-fin velocity which results in lower pressure drop, in comparison to straight fins. The carbon-filled polymer (Ice9 Flex) heat sink was shown to have much superior heat dissipation capability compared to metal filled filament heat sinks.