Main Title |
Comparison of Numerical and Laboratory Experiments on Density-Stratified Flows Around a Three-Dimensional Hill. |
Author |
Rottman, J. W. ;
Lawson, R. E. ;
Snyder, W. H. ;
|
CORP Author |
North Carolina State Univ. at Raleigh.;Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. |
Year Published |
1987 |
Report Number |
EPA/600/D-87/055; |
Stock Number |
PB87-167003 |
Additional Subjects |
Air pollution ;
Mathematical models ;
Tests ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB87-167003 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
14p |
Abstract |
Direct comparisons between the results of a numerical model and laboratory experiments are presented for density-stratified flows around an isolated three-dimensional hill. The numerical model integrates the Navier-Stokes equations for incompressible stratified flow using a finite-difference scheme. Numerical calculations were made for Reynolds numbers (based on the hill height) of 100 and 400 and for Froude numbers between 0.5 and 2 as well as for neutrally stratified flow. The laboratory experiments were performed in a small (2.1m long) stratified towing tank, a large (25m long) stratified towing tank, and a meteorological wind tunnel. Experimental results are presented for Reynolds numbers between 100 and 40,000 and for the same Froude numbers as used in the numerical calculations. The numerical model with a Reynolds number of 100 compared best with the large scale laboratory experiments, although there were substantial differences near the hill surface and in the wake of the hill. |