A Photographic Investigation of Bubble Nucleation from Artificial Cavities
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Authors
Eller, John Christian
Subjects
High Speed Photography
Glass Capillaries
Artificial Cavities
Bubble Nucleation
Bubble Growth and Departure
Glass Capillaries
Artificial Cavities
Bubble Nucleation
Bubble Growth and Departure
Advisors
Marto, Paul J.
Date of Issue
1968-06
Date
June 1968
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
High speed motion pictures of bubble nucleation from glass capillaries were obtained. The fluids used were: distilled water, water with wetting agent, water with sucrose, and ethanol. Capillaries of cylindrical, conical, and reentrant geometries were used with inner diameters ranging from .0182 to .0381 inches. The penetration of the liquid-vapor interface into a cavity after bubble departure appeared to be inertia controlled. Cavity interior geometry and cleanliness had a direct effect upon the liquid-vapor interface penetration distance. The depth of penetration of the interface increased as cavity size increased. Viscosity reduced the interface penetration. Bubble growth curves were obtained for a typical bubble in each fluid. Bubble departure diameter appeared to be independent of cavity geometry but increased as cavity size increased. Viscosity retarded bubble growth during the initial stages of growth.
Type
Thesis
Description
Series/Report No
Department
Mechanical Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funding
Format
54 p.: ill.; 28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.