Flow boiling at subatmospheric pressure

N. Colgan, J. L. Bottini, C. S. Brooks

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Experiments have been conducted in a square channel to investigate wall nucleation characteristics in subcooled boiling flows. The experimental data is presented as a parametric study of the effects of system pressures, flow rates and inlet subcoolings on nucleation characteristics. Bubble departure diameters and departure frequencies are measured and compared to an existing model. The model is shown to predict the trend in departure diameter well for all conditions and to predict departure frequencies well for all conditions except for those at low boiling number for low and moderate pressures. These conditions did not appear to be fully within the nucleating regime. Additionally, experiments to determine boiling heat transfer rate and critical heat flux (CHF) at subatmospheric pressures were conducted. Heat transfer and CHF is shown to be significantly lower under subatmospheric conditions.

Original languageEnglish (US)
Title of host publicationNuclear and Emerging Technologies for Space, NETS 2018
PublisherAmerican Nuclear Society
Number of pages4
ISBN (Print)9781510859609
StatePublished - 2016
EventNuclear and Emerging Technologies for Space, NETS 2018 - Las Vegas, United States
Duration: Feb 26 2018Mar 1 2018

Publication series

NameNuclear and Emerging Technologies for Space, NETS 2018


OtherNuclear and Emerging Technologies for Space, NETS 2018
Country/TerritoryUnited States
CityLas Vegas

ASJC Scopus subject areas

  • Aerospace Engineering
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering


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