Main Title |
Effects of Stable Stratification on Turbulent Diffusion and the Decay of Grid Turbulence. |
Author |
Britter, R. E. ;
Hunt, J. C. R. ;
Marsh, G. L. ;
Snyder, W. H. ;
|
CORP Author |
Environmental Sciences Research Lab., Research Triangle Park, NC. ;Cambridge Univ. (England). ;Northrop Services, Inc., Research Triangle Park, NC. |
Year Published |
1983 |
Report Number |
EPA-600/J-82-083; |
Stock Number |
PB83-243287 |
Additional Subjects |
Turbulent diffusion ;
Turbulent flow ;
Stratification ;
Velocity measurement ;
Internal waves ;
Fluid flow ;
Froude number ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB83-243287 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
21p |
Abstract |
Experiments are described in which a grid was towed horizontally along a large tank filled first with water and then with a stably stratified saline solution. The decay rates of the root-mean-square (r.m.s.) turbulent velocity components (w',v') perpendicular to the tow direction were measured by a Taylor diffusion probe and found to be unaffected by the stable stratification over the distances measured (5 to 20 mesh lengths downstream) and over a range of Froude number (U/NM) of infinity and 8.5 to 0.5, where M is the mesh length, U the velocity, and N the buoyancy frequency. The vertical turbulence produced at the grid was reduced up to 30% by the stratification when U/MN about 0.5. Large-scale internal wave motion was not evident in the turbulence produced by this horizontally towed grid, in contrast to the motion produced by a vertically towed grid. |