Synchrotron x-ray imaging visualization study of capillary-induced flow and critical heat flux on surfaces with engineered micropillars
- Pukyong National Univ., Busan ( Korea, Republic of). Dept. of Mechanical Design Engineering
- 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
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- 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
Web of Science
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 |
Similar Records
Limiting Factors for External Reactor Vessel Cooling
Small Scale Field Test Demonstrating CO2 Sequestration In Arbuckle Saline Aquifer And By CO2-Eor At Wellington Field, Sumner County, Kansas