Accession Number : ADA328903
Title : Field Use of Intensity of Turbulence, Richardson's Number and Eddy Diffusivity to Make Diffusion Calculations
Descriptive Note : Technical rept.
Corporate Author : ARMY DUGWAY PROVING GROUND UT
Personal Author(s) : Waldron, Jr, Albert W
PDF Url : ADA328903
Report Date : Mar 1968
Pagination or Media Count : 66
Abstract : This report consists of five sections. Section 1 is an introduction to the report. Sections 2 through 5 treat related subjects. Section 2 demonstrates the accuracy to be expected from diffusion dosage calculations which make use of direct measurements of intensity of turbulence and wind speed. Section 3 uses a derived expression for the relationship of Richardson's number to intensity of turbulence and the resulting dosage calculations are discussed. Section 4 tests the universality of the derived relationship of Richardson's number to intensity of turbulence. Section 5 relates the variance of vertical wind speeds at different sites and altitudes to Richardson's number. Section 5 further treats some of the problems involved in calculating and using eddy diffusivity to make dosage calculations, and also suggests a way of calculating eddy diffusivity at heights between the top of the surface boundary layer and the gradient wind level.
Descriptors : *EDDIES(FLUID MECHANICS), *TURBULENCE, *WIND VELOCITY, AEROSOLS, ATMOSPHERIC TEMPERATURE, BOUNDARY LAYER, DIFFUSIVITY, METEOROLOGICAL DATA, RICHARDSON NUMBER, WIND DIRECTION
Subject Categories : Meteorology
Distribution Statement : APPROVED FOR PUBLIC RELEASE