Libraries at University of Nebraska-Lincoln
Document Type
Thesis
Date of this Version
8-1963
Citation
Thesis (M.S.)—University of Nebraska—Lincoln, 1963. Department of Agricultural Engineering.
Abstract
The objective of the study is to develop the instrumentation needed to measure the vapor pressure gradient above a water surface, with a view to predicting the rate of evaporation from that surface.
This study demonstrated the practicality of a copper constantan thermocouple psychrometer for measuring the vapor pressure or relative humidity at a point, under still atmospheric conditions.
Observations indicated that the vapor pressure increased linearly for approximately 0.3 inches above the water surface in a still atmosphere.
Evaporation from a free water surface under these conditions appeared to be a process of molecular diffusion only and could be described by Steffan’s molecular diffusion equation.
Advisor: L. W. Hurlbut
Comments
Copyright 1963, the author. Used by permission.