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- <p>Nucleation<br />Helium<br />Water</p> (1)
- Adiabatic invariants<br />Cloud chamber<br />Condensation (1)
- Adiabatic invariants<br />Fluid dynamics<br />Water vapor, Atmospheric (1)
- Atmospheric nucleation<br />Cloud chamber<br />Drops<br />Evaporation (1)
- Glass<br />Internal friction -- Measurement (1)
Articles 1 - 6 of 6
Full-Text Articles in Physics
A Measurement Of Dead Space And Its Effect On The Homogeneous Nucleation Rate Of Water Vapor In Helium, Michael A. Grayson
A Measurement Of Dead Space And Its Effect On The Homogeneous Nucleation Rate Of Water Vapor In Helium, Michael A. Grayson
Masters Theses
"The existence of a "dead space" surrounding each nucleated water droplet is demonstrated and measurements of its rate of development are made. The effects of this "dead space" are considered to be due to both the removal of vapor from the helium-water vapor mixture and the evolution of heat about the drop due to its growth. The results confirm the usefulness of the concept of a "dead space" and provide a means for its measurement with respect to time. Recommendations for further study and a method of correcting for dead space effects is given"--page [i].
A Second Study Of Homogeneous Nucleation Of Water Vapor In Helium, Raymond J. Schmitt
A Second Study Of Homogeneous Nucleation Of Water Vapor In Helium, Raymond J. Schmitt
Masters Theses
"Absolute homogeneous nucleation rates in a supersaturated mixture of water vapor and helium are measured using a long sensitive time expansion chamber and a method devised by Kassner and Allard. A pulse technique is employed to produce the nucleation in an effort to suppress disturbing influences of vapor depletion and droplet growth. The time-varying nature of the supersaturation during the nucleation pulse is taken into account by an Integration over the pulse. Observed and theoretically predicted droplet concentrations are related by an assumed nucleation rate law which is adjusted until the total droplet populations predicted by integration of the assumed …
Operating Characteristics Of A Cloud Chamber Suited For Condensation Measurements, Donald L. Packwood
Operating Characteristics Of A Cloud Chamber Suited For Condensation Measurements, Donald L. Packwood
Masters Theses
"It is the main purpose of this research to investigate the validity of using the adiabatic laws to determine the temperature from the pressure ratio. Some of the effects which might invalidate the use of the adiabatic laws will be studied. Special consideration will be given to the accurate calculation of [gamma]. Carstens' approximate calculation of the heat flow into the chamber due to conduction will be checked. A measurement will be made of how long the chamber remains adiabatic after an expansion when the continuing expansion technique is used. The static temperature gradient throughout the chamber will be measured …
Drop Growth In A Supersaturated Vapor, Roger Buecher
Drop Growth In A Supersaturated Vapor, Roger Buecher
Masters Theses
"Using kinetic theory and the thermodynamics of phase transitions, a method is derived for finding the growth rate and temperature increase of a droplet in water vapor which has been supersaturated by the expansion of a cloud chamber. Calculations are performed for a specific numerical example and compared to other work in this field"--Abstract, page [2].
A Study Of Re-Evaporation Nuclei, Ronald Dawbarn
A Study Of Re-Evaporation Nuclei, Ronald Dawbarn
Masters Theses
"Classical considerations of the evaporation of a homogeneously nucleated droplet in an atmosphere of low humidity, indicates complete evaporation of the drop. Experimental results however, show that there is left behind a residual nucleus that is quite stable. Condensation occurs on these nuclei at comparatively low supersaturations. Using a specially instrumented cloud chamber, experimental procedures are described which attempt to investigate some of the properties of these nuclei. Various possibilities causing this stability are examined and compared to the experimental results obtained"--page [ii].
An Instrument For The Measurement Of Anelastic Properties Of Glass, Thomas Frederick Miller
An Instrument For The Measurement Of Anelastic Properties Of Glass, Thomas Frederick Miller
Masters Theses
"An inverted torsion pendulum for measuring the internal friction and dynamic shear modulus of glass fibers over an extended temperature range has been constructed and calibrated. The calibration consists of the determination of the moment of inertia. Extraneous damping losses were investigated and primary sources were found to be (1) the suspension thread, (2) the method of securing the fiber and (3) air damping. Anelastic measurements were made on an annealed vitreous silica fiber and a soda-lime-silica fiber"--Abstract, page ii.