Field Use of Intensity of Turbulence, Richardson's Number and Eddy Diffusivity to Make Diffusion Calculations
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1968
- Accession Number
- ADA328903
Entities
People
- Albert W. Waldron Jr.