On the velocity profile of vapour bubbles at critical heat flux

W. Hebel; W. Detavernier

doi:10.1016/0029-5493(83)90063-8

On the velocity profile of vapour bubbles at critical heat flux

W. Hebel, W. Detavernier

Research output › peer-review

Abstract

A theoretical model is put forward to describe the flow velocity of the vapour phase near a heated wall when departure from nucleate boiling (DNB) is approached. The model refers to experimental observations which have been put into correlations and presented in an earlier article. It consists in a possible extrapolation of these previously proposed DNB-correlations towards the determination of the maximum critical heat flux in cooling water under forced convection. Comparison is made with the well-known Kutateladze/Zuber correlation, which usually applies to CHF in saturated pool boiling. It is suggested that the present hydrodynamic model could generate analogous results by using a different approach. Moreover, it is shown that the model could equally be applied to determine the DNB limit in both free and forced convection, constituting a link between them.

Original language	English
Pages (from-to)	253-257
Number of pages	5
Journal	Nuclear Engineering and Design
Volume	74
Issue number	2
DOIs	https://doi.org/10.1016/0029-5493(83)90063-8
State	Published - Feb 1983

ASJC Scopus subject areas

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering
Safety, Risk, Reliability and Quality
Waste Management and Disposal
Mechanical Engineering

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10.1016/0029-5493(83)90063-8

Cite this

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abstract = "A theoretical model is put forward to describe the flow velocity of the vapour phase near a heated wall when departure from nucleate boiling (DNB) is approached. The model refers to experimental observations which have been put into correlations and presented in an earlier article. It consists in a possible extrapolation of these previously proposed DNB-correlations towards the determination of the maximum critical heat flux in cooling water under forced convection. Comparison is made with the well-known Kutateladze/Zuber correlation, which usually applies to CHF in saturated pool boiling. It is suggested that the present hydrodynamic model could generate analogous results by using a different approach. Moreover, it is shown that the model could equally be applied to determine the DNB limit in both free and forced convection, constituting a link between them.",

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AB - A theoretical model is put forward to describe the flow velocity of the vapour phase near a heated wall when departure from nucleate boiling (DNB) is approached. The model refers to experimental observations which have been put into correlations and presented in an earlier article. It consists in a possible extrapolation of these previously proposed DNB-correlations towards the determination of the maximum critical heat flux in cooling water under forced convection. Comparison is made with the well-known Kutateladze/Zuber correlation, which usually applies to CHF in saturated pool boiling. It is suggested that the present hydrodynamic model could generate analogous results by using a different approach. Moreover, it is shown that the model could equally be applied to determine the DNB limit in both free and forced convection, constituting a link between them.

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