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Title: Detection of vapor nanobubbles by small angle neutron scattering (SANS)

Abstract

Experiments using boiling water on untreated (roughness 100–300 nm) metal surfaces using small-angle neutron scattering (SANS) show the appearance of structures that are 50–70 nm in size when boiling is present. The scattering signal disappears when the boiling ceases, and no change in the signal is detected at any surface temperature condition below saturation. This confirms that the signal is caused by vapor nanobubbles. Two boiling regimes are evaluated herein that differ by the degree of subcooling (3–10 °C). A polydisperse spherical model with a log-normal distribution fits the SANS data well. In conclusion, the size distribution indicates that a large number of nanobubbles exist on the surface during boiling, and some of them grow into large bubbles.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1465060
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 112; Journal Issue: 15; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Popov, Emilian L., He, Lilin, Dominguez-Ontiveros, Elvis E., and Melnichenko, Yuri B. Detection of vapor nanobubbles by small angle neutron scattering (SANS). United States: N. p., 2018. Web. doi:10.1063/1.5023595.
Popov, Emilian L., He, Lilin, Dominguez-Ontiveros, Elvis E., & Melnichenko, Yuri B. Detection of vapor nanobubbles by small angle neutron scattering (SANS). United States. doi:10.1063/1.5023595.
Popov, Emilian L., He, Lilin, Dominguez-Ontiveros, Elvis E., and Melnichenko, Yuri B. Mon . "Detection of vapor nanobubbles by small angle neutron scattering (SANS)". United States. doi:10.1063/1.5023595. https://www.osti.gov/servlets/purl/1465060.
@article{osti_1465060,
title = {Detection of vapor nanobubbles by small angle neutron scattering (SANS)},
author = {Popov, Emilian L. and He, Lilin and Dominguez-Ontiveros, Elvis E. and Melnichenko, Yuri B.},
abstractNote = {Experiments using boiling water on untreated (roughness 100–300 nm) metal surfaces using small-angle neutron scattering (SANS) show the appearance of structures that are 50–70 nm in size when boiling is present. The scattering signal disappears when the boiling ceases, and no change in the signal is detected at any surface temperature condition below saturation. This confirms that the signal is caused by vapor nanobubbles. Two boiling regimes are evaluated herein that differ by the degree of subcooling (3–10 °C). A polydisperse spherical model with a log-normal distribution fits the SANS data well. In conclusion, the size distribution indicates that a large number of nanobubbles exist on the surface during boiling, and some of them grow into large bubbles.},
doi = {10.1063/1.5023595},
journal = {Applied Physics Letters},
number = 15,
volume = 112,
place = {United States},
year = {2018},
month = {4}
}

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