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RESEARCH PAPERS

Microbubble Spectra and Superheat in Water and Sodium, Including Effect of Fast Neutron Irradiation

[+] Author and Article Information
J. J. Pyun

Combustion Engineering Inc., Windsor, Conn.

F. G. Hammitt

Cavitation and Multiphase Flow Lab, Department of Mechanical Engineering, University of Michigan, Ann Arbor, Mich.

A. Keller

Department of Mechanical Engineering, University of Michigan, Ann Arbor, Mich.

J. Fluids Eng 98(1), 87-94 (Mar 01, 1976) (8 pages) doi:10.1115/1.3448223 History: Received January 20, 1975; Online October 12, 2010

Abstract

The microbubble spectrum in a sample of tap water was measured by the Coulter counter technique under various conditions, and at the same time the tensile strength (i.e., “superheat” capacity) of the tap water was measured by the ultrasonic cavitation technique. It was observed in this experiment that the microbubble population and size increased and the superheat decreased for increasing temperature and under fast neutron irradiation. Finally the generalized Noltingk-Neppiras equation was solved numerically for selected initial microbubble radii, and the suppression pressure (or superheat) determined by this numerical solution was compared with the experimental result. Apparent inconsistencies in experimental results may be primarily due to the neglect of the rectified diffusion effect in the present analysis.

Copyright © 1976 by ASME
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