Numerical and Wind Tunnel Simulation of Response of Stratified Shear Layers to Nonhomogeneous Surface Features.
Abstract
In the report four different categories of flow are investigated in a thermal wind tunnel. They are: Airflow over an infinitely wide obstacle; Airflow over an infinitely wide heated island; Airflow over an infinitely wide heated obstacle; and, Airflow over a heated island with a finite width. The first three categories are two dimensional aspects of prototype phenomena: a mountain lee-wave, an urban heat island, and a heated mountain, respectively. The last displays a three dimensional feature of a corresponding urban heat island phenomenon. Numerical models were constructed for the first three cases. However, for the three dimensional problem, only the wind tunnel experiment was conducted since a numerical integration for such a three dimensional problem is not practical yet. Both laboratory and numerical results showed close agreement. They indicated strong nonlinearity; perturbation quantities could not be neglected compared with their mean values especially in the vicinity of the disturbing source (obstacle, heated area), and a linear super-position rule could not be applied to predict the solution of combined effects of heating and topography. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1971
- Accession Number
- AD0730953
Entities
People
- Robert N. Meroney
- Tetsuji Yamada
Organizations
- Colorado State University