Some features of instantaneous point source diffusion within a turbulent boundary layer
Open Access
- 1 June 1972
- journal article
- Published by Stockholm University Press in Tellus
- Vol. 24 (3) , 230-236
- https://doi.org/10.1111/j.2153-3490.1972.tb01549.x
Abstract
Diffusion of helium gas from an instantaneous point source within a neutral boundary layer has been studied. Concentrations from a simulated point source, located at a fixed height of 8 inches above a smooth surface, were measured for several downstream cross-sections of the diffusing cloud. Separation of the total dispersion into two components, spreading and meandering, is obtained on the basis of Gifford's fluctuating model. The results of this analysis are used to determine the Hay-Pasquill scale parameter which relates the Lagrangian and Eulerian scales of turbulence. Meandering is shown to have a significant effect on the scale parameter. DOI: 10.1111/j.2153-3490.1972.tb01549.xKeywords
This publication has 3 references indexed in Scilit:
- Some Lagrangian Properties of Turbulence Deduced from Atmospheric Diffusion ExperimentsJournal of Applied Meteorology, 1966
- Turbulent Diffusion and Anemometer MeasurementsJournal of the Engineering Mechanics Division, 1962
- Diffusion from a Continuous Source in Relation to the Spectrum and Scale of TurbulencePublished by Elsevier ,1959