Synchrotron x-ray imaging visualization study of capillary-induced flow and critical heat flux on surfaces with engineered micropillars

Science Advances
Dong In YuMoo Hwan Kim

Abstract

Over the last several decades, phenomena related to critical heat flux (CHF) on structured surfaces have received a large amount of attention from the research community. The purpose of such research has been to enhance the safety and efficiency of a variety of thermal systems. A number of theories have been put forward to explain the key CHF enhancement mechanisms on structured surfaces. However, these theories have not been confirmed experimentally because of limitations in the available visualization techniques and the complexity of the phenomena. To overcome these limitations and elucidate the CHF enhancement mechanism on the structured surfaces, we introduce synchrotron x-ray imaging with high spatial (~2 μm) and temporal (~20,000 Hz) resolutions. This technique has enabled us to confirm that capillary-induced flow is the key CHF enhancement mechanism on structured surfaces.

References

Dec 13, 2006·Physical Review Letters·V S NikolayevD Beysens
Jun 24, 2008·Small·Chen LiG P Peterson
Jan 20, 2009·Nano Letters·Renkun ChenArun Majumdar
Sep 3, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Rong XiaoEvelyn N Wang
Nov 8, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Hie Chan Kang, Anthony M Jacobi
Jan 17, 2013·Physical Chemistry Chemical Physics : PCCP·Vahid MortazaviMichael Nosonovsky
Aug 30, 2014·Langmuir : the ACS Journal of Surfaces and Colloids·Md Mahamudur RahmanMatthew McCarthy
Sep 9, 2015·Nature Communications·Navdeep Singh DhillonKripa K Varanasi

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Citations

May 12, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Shakerur RidwanMatthew McCarthy
Jun 27, 2021·Science Advances·Jiaqi LiNenad Miljkovic
Sep 6, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·An ZouShalabh C Maroo
Nov 1, 2020·Journal of Colloid and Interface Science·Sachin NairFrieder Mugele

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Methods Mentioned

BETA
infrared thermometry
scanning
profiler
x-ray imaging
X-ray

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