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

Journal Article · · Science Advances
ORCiD logo [1]; ORCiD logo [2];  [2]; ORCiD logo [3];  [4]; ORCiD logo [5]
  1. Pukyong National Univ., Busan ( Korea, Republic of). Dept. of Mechanical Design Engineering
  2. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Dept. of Mechanical Engineering
  3. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Division of Advanced Nuclear Engineering
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  5. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Dept. of Mechanical Engineering; Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of). Division of Advanced Nuclear Engineering

Over the past 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 due to limitations in the available visualization techniques and the complexity of the phenomena. To overcome the limitations of the previous visualization techniques and elucidate the CHF enhancement mechanism on the structured surfaces, we introduce synchrotron X-ray imaging with high spatial (~2 μm) and time (~20,000 Hz) resolutions. Lastly, this technique has enabled us to confirm that capillary-induced flow is the key CHF enhancement mechanism on structured surfaces.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Research Foundation of Korea (NRF)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1432208
Journal Information:
Science Advances, Vol. 4, Issue 2; ISSN 2375-2548
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

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Cited By (2)

Bubble dynamics and heat transfer characteristics on a micropillar-structured surface with different nucleation site positions journal January 2020
Application of Deep Belief Network for Critical Heat Flux Prediction on Microstructure Surfaces journal July 2019