Experimental investigation on flow characteristics in open rectangular microgrooves using micro-PIV. (5th August 2016)

• Record Type: Journal Article
• Authors: Yu, Dong; Guo, Chaohong; Xie, Ningning; Wang, Tao; Hu, Xuegong; Tang, Dawei
• Is Part Of: Applied thermal engineering. Volume 106(2016:Aug.)
• Page Start: 906
• Page End: 915
• Publication Date: 2016-08-05
• Subjects: Micro-PIV -- Open rectangular microgrooves -- Flow characteristics -- Liquid cross-sectional area -- Central thickness of the liquid film; Heat engineering -- Periodicals; Heating -- Equipment and supplies -- Periodicals; Periodicals; 621.40205
• DOI: 10.1016/j.applthermaleng.2016.05.188
• Languages: English
• ISSNs: 1359-4311

Abstract

Highlights: Liquid cross-sectional area decreases along the axis of microgrooves. Liquid cross-sectional area decreases as the inclined angle increases. Central thickness of the liquid film of the meniscus reduces along the axis. Abstract: In this paper, flow characteristics in open rectangular microgrooves were investigated by micro-PIV. Liquid cross-sectional areas and central thickness of the liquid film of the meniscus along the axial direction of the microgroove were both studied. The results show that there is a 'dead zone' near the end of the recession stage where the fluid does almost not flow. Under the same heat flux condition, liquid cross-sectional area decreases with increase of the inclined angles in the same axial cross-section. Under the same inclined angle, liquid cross-sectional area decreases along the axis of the microgrooves heat sink. Under different inclined angles condition, liquid cross-sectional area in corner flow stage of rectangular microgrooves heat sinks decreases along the axis. Liquid cross-sectional area in corner flow stage increases as the inclined angle increases at the same directional cross-section. Central thickness of the liquid film of the meniscus reduces along the axis under the same heat flux condition; central thickness of the liquid film of the meniscus decreases with the increasing heat flux at the same axial cross-section.