The Critical Richardson Number.
Abstract
The Obukhov dynamic similarity of flows hypothesis for the surface boundary layer of the atmosphere has been reevaluated with respect to an arbitrary variable rather than a constant in the diabatic influence function. A literature search revealed that estimates of the so-called constant beta ranged from 0.6 < beta < 17, suggesting that beta was indeed a variable. Analysis of 103 wind and temperature profiles extracted from the literature led to the conclusion that no constant exists for the log plus linear profile form for thermally stratified stable flow and that the critical value of the gradient Richardson number is unity. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1977
- Accession Number
- ADA046834
Entities
People
- Frank V. Hansen
Organizations
- United States Army Communications-Electronics Command