The distortion of a passive scalar by two‐dimensional objects
| Autor: | Hamid Rahai, John C. LaRue |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Characteristic length business.industry Turbulence Mechanical Engineering Isotropy Scalar (mathematics) Computational Mechanics Mechanics Strain rate Condensed Matter Physics Rod Physics::Fluid Dynamics Optics Heat flux Mechanics of Materials Vortex stretching business |
| Zdroj: | Physics of Fluids. 7:98-107 |
| ISSN: | 1089-7666 1070-6631 |
| DOI: | 10.1063/1.868740 |
| Popis: | The response of a heated, nearly homogeneous and isotropic turbulent field to a nonuniform rapid distortion upstream of two‐dimensional objects placed in a homogeneous grid generated flow is investigated experimentally. In particular, the effect of the nonuniform distortion on the single‐point statistical properties of the velocity and a passive scalar (temperature), the axial heat flux and higher‐order cross moments are presented. The nearly homogeneous, turbulent flow is produced by a biplane grid of rods and a square mesh grid of electrically heated wire that is placed downstream of the turbulence producing grid. Spatially and temporally resolved, simultaneous measurements of the streamwise turbulent velocity and temperature are obtained upstream of several two‐dimensional objects along the mean stagnation streamline. The effects of the blocking and vortex stretching mechanisms on the root‐mean‐square (RMS) velocity for various ratios of the integral length scale to the characteristic length of the obj... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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