Single-dye multispectral PLIF (SDMS-PLIF) for quantitative thermographic visualisation of nucleate boiling
File(s)
Published version
Author(s)
Lobasov, Aleksei
Chen, Zengchao
Narayan, Surya
Pervunin, Konstantin
Markides, Christos
Type
Conference Paper
Abstract
The boiling of dielectric fluids in miniaturised channels has emerged as one of the promising most solutions to high-density electronics cooling. Although significant breakthroughs have been made, the fundamental understanding of the hydrodynamic and thermal performance in flows relevant is still, which calls further for development of state-of-the-art measurement techniques and their deployment for the provision of high quality, detailed experimental information. To this end, we conducted an experimental investigation of flow boiling in a miniaturised vertical square channel with a hydraulic diameter of 5 mm, using HFE-7100 as the working fluid. A whole-field thermographic imaging approach to referred as single-dy multispectral planar laser-induced fluorescence (SDMS-PLIF) developed was and applied to measure spatiotemporally-resolved temperature fields. For its implementation, Nile Red, the thermosensitive lipophilic dye, was dissolved in HFE-7100 as the fluorophore. The took taken at selected conditions to achieve a nucleate boiling regime in a laminar flow. Time-lapse temperature maps provided direct evidence for bubble-induced mixing observed as thermal plumes, where a portion of hot fluid is advected above the thermal boundary at the heated wall and penetrates the colder bulk phase in the flow core.
Date Issued
2024-07-08
Date Acceptance
2024-06-12
Citation
2024
Publisher
International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics
Start Page
1
End Page
10
Journal / Book Title
Proceedings of the International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics
Volume
21
Copyright Statement
© 2024 The Author(s).
Source
21st International Symposium on Applications of Laser and Imaging Techniques to Fluid Mechanics
Publication Status
Published
Start Date
2024-07-08
Finish Date
2024-07-11
Coverage Spatial
Lisbon, Portugal
Date Publish Online
2024-07-08