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

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.
Authors:
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
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 4; Journal Issue: 2; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC); National Research Foundation of Korea (NRF)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; Boiling; Boiling, micro; capillary-induced flow; critical heat flux; synchrotron X-ray imaging; micro
OSTI Identifier:
1432208

Yu, Dong In, Kwak, Ho Jae, Noh, Hyunwoo, Park, Hyun Sun, Fezzaa, Kamel, and Kim, Moo Hwan. Synchrotron x-ray imaging visualization study of capillary-induced flow and critical heat flux on surfaces with engineered micropillars. United States: N. p., Web. doi:10.1126/sciadv.1701571.
Yu, Dong In, Kwak, Ho Jae, Noh, Hyunwoo, Park, Hyun Sun, Fezzaa, Kamel, & Kim, Moo Hwan. Synchrotron x-ray imaging visualization study of capillary-induced flow and critical heat flux on surfaces with engineered micropillars. United States. doi:10.1126/sciadv.1701571.
Yu, Dong In, Kwak, Ho Jae, Noh, Hyunwoo, Park, Hyun Sun, Fezzaa, Kamel, and Kim, Moo Hwan. 2018. "Synchrotron x-ray imaging visualization study of capillary-induced flow and critical heat flux on surfaces with engineered micropillars". United States. doi:10.1126/sciadv.1701571. https://www.osti.gov/servlets/purl/1432208.
@article{osti_1432208,
title = {Synchrotron x-ray imaging visualization study of capillary-induced flow and critical heat flux on surfaces with engineered micropillars},
author = {Yu, Dong In and Kwak, Ho Jae and Noh, Hyunwoo and Park, Hyun Sun and Fezzaa, Kamel and Kim, Moo Hwan},
abstractNote = {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.},
doi = {10.1126/sciadv.1701571},
journal = {Science Advances},
number = 2,
volume = 4,
place = {United States},
year = {2018},
month = {2}
}