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Title: Pasquill`s influence: on the evaporation from various liquids into the atmosphere

Abstract

Pasquill`s development of an evaporation model as well as his experimental work on the subject are important in view of the recent emphasis on toxic chemical releases to the environment. Pasquill`s contributions to the field of atmospheric diffusion are enormous and well-known. The Pasquill stability classification enables us to apply the Gaussian diffusion model in our daily life. The Gaussian diffusion model has been widely and routinely applied in industry for the estimate of the air concentration ant to manage the radioactive and hazardous wastes in recent years. Equally important bus no less than his contribution to the Gaussian diffusion model is Pasquill`s influence on the subject of evaporation from various liquid surfaces into the atmosphere. An evaporation model taking into account the vertical variations of the mean wind speed and the eddy exchange was first introduced by Sutton. The Sutton model made it possible to estimate toxic chemical release from a smooth liquid surface to the environment. In the Sutton model, the process of vapor transfer is based on the momentum exchange involving a parameter of the air viscosity. Pasquill modified Sutton`s evaporation theory by introducing another new parameter, the molecular diffusivity. This replaced the viscosity in the Suttonmore » model, an important missing parameter. The Sutton-Pasquill evaporation model has found wide applications in industry for half a century. Out of these two parameters, a non-dimensional parameter can be formed; it can be used to modify the Pasquill evaporation model. Experimental data in the laboratories and the fields indicate that the rate of evaporation from a liquid surface is dependent on a Schmidt number. Thus, in this study, we will consider the modification of the Sutton-Pasquill model and provide some theoretical justifications.« less

Authors:
Publication Date:
Research Org.:
Westinghouse Hanford Co., Richland, WA (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
245073
Report Number(s):
WHC-SA-2892; CONF-960127-9
ON: DE96009109
DOE Contract Number:  
AC06-87RL10930
Resource Type:
Technical Report
Resource Relation:
Conference: 9. joint American Meteorological Society/Air and Waste Management Association conference on applications of air pollution meteorology, Atlanta, GA (United States), 28 Jan - 2 Feb 1996; Other Information: PBD: Sep 1995
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; EVAPORATION; MATHEMATICAL MODELS; LIQUIDS; TOXIC MATERIALS; EMISSION; SURFACE AIR; GASEOUS DIFFUSION; VAPORS; VISCOSITY; THEORETICAL DATA; SURFACES; WIND; VELOCITY

Citation Formats

Huang, C.H. Pasquill`s influence: on the evaporation from various liquids into the atmosphere. United States: N. p., 1995. Web. doi:10.2172/245073.
Huang, C.H. Pasquill`s influence: on the evaporation from various liquids into the atmosphere. United States. doi:10.2172/245073.
Huang, C.H. Fri . "Pasquill`s influence: on the evaporation from various liquids into the atmosphere". United States. doi:10.2172/245073. https://www.osti.gov/servlets/purl/245073.
@article{osti_245073,
title = {Pasquill`s influence: on the evaporation from various liquids into the atmosphere},
author = {Huang, C.H.},
abstractNote = {Pasquill`s development of an evaporation model as well as his experimental work on the subject are important in view of the recent emphasis on toxic chemical releases to the environment. Pasquill`s contributions to the field of atmospheric diffusion are enormous and well-known. The Pasquill stability classification enables us to apply the Gaussian diffusion model in our daily life. The Gaussian diffusion model has been widely and routinely applied in industry for the estimate of the air concentration ant to manage the radioactive and hazardous wastes in recent years. Equally important bus no less than his contribution to the Gaussian diffusion model is Pasquill`s influence on the subject of evaporation from various liquid surfaces into the atmosphere. An evaporation model taking into account the vertical variations of the mean wind speed and the eddy exchange was first introduced by Sutton. The Sutton model made it possible to estimate toxic chemical release from a smooth liquid surface to the environment. In the Sutton model, the process of vapor transfer is based on the momentum exchange involving a parameter of the air viscosity. Pasquill modified Sutton`s evaporation theory by introducing another new parameter, the molecular diffusivity. This replaced the viscosity in the Sutton model, an important missing parameter. The Sutton-Pasquill evaporation model has found wide applications in industry for half a century. Out of these two parameters, a non-dimensional parameter can be formed; it can be used to modify the Pasquill evaporation model. Experimental data in the laboratories and the fields indicate that the rate of evaporation from a liquid surface is dependent on a Schmidt number. Thus, in this study, we will consider the modification of the Sutton-Pasquill model and provide some theoretical justifications.},
doi = {10.2172/245073},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Sep 01 00:00:00 EDT 1995},
month = {Fri Sep 01 00:00:00 EDT 1995}
}

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