Record Display for the EPA National Library Catalog


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 ;
Library Call Number Additional Info Location Last
NTIS  PB83-243287 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 21p
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.