Doctoral Dissertations

Abstract

"The growth rates of water drops in a Wilson expansion cloud chamber are measured with air, argon and helium as the carrier gas, in the size range of .5 to 10 microns. The drops growing in the supersaturated chamber exhibit oscillations in the scattered intensity as predicted by Mie theory. Scattered intensity is measured at 30 degrees to the He-Ne laser beam. Supersaturation ratios during growth range from S =1.2 to S = 3.5 for all three gases. The initial temperature is measured and the pressure is monitored continuously so that droplet growth theory can be compared with experiment. Three droplet growth theories were examined, which were chosen as representative of published work. Two of the theories used the sticking coefficient alone as a parameter, while the third used both sticking and thermal accommodation coefficients. No interpretation of the numerical value of the sticking coefficient could be made. In the theory invoking sticking and thermal accommodation coefficients, the former was set to 0.035 in line with other work and the thermal accommodation coefficient fitted as a parameter. The thermal accommodation coefficient was greatest for air and smallest for helium"--Abstract, page ii.

Advisor(s)

Kassner, James L.

Committee Member(s)

Lund, Louis H., 1919-1998
Schuster, Burton
Anderson, Richard A.
Plummer, O. R.

Department(s)

Physics

Degree Name

Ph. D. in Physics

Sponsor(s)

University of Missouri--Rolla. Graduate Center for Cloud Physics Research

Publisher

University of Missouri--Rolla

Publication Date

1972

Pagination

vii, 108 pages

Note about bibliography

Includes bibliographical references (pages 48-49).

Rights

© 1972 Michael Anthony Vietti, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

Cloud chamberAtmospheric nucleationAccommodation coefficient

Thesis Number

T 2748

Print OCLC #

6034038

Electronic OCLC #

884348248

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