Dynamic and thermal fields of a turbulent flow in a pipe with aspiration at the surface
Abstract
The effect of aspiration on thermal and dynamic fields of a turbulent flow in a cylindrical pipe is investigated. The porous surface is heated, with the heat behaving as an almost passive contaminant. Aspiration is found to strongly affect the mean temperature and longitudinal velocity profiles. The pseudovelocity in the inertial zone is found to be correctly represented by the expression proposed by Simpson et al. (1970). The coefficients of heat and momentum exchange at the surface are determined, and their evolution is investigated as a function of the level of aspiration. The evolution of the Prandtl number is studied. It is shown that aspiration reduced the number of perturbations giving rise to turbulence near the surface.
- Publication:
-
6th International Heat Transfer Conference, Volume 5
- Pub Date:
- 1978
- Bibcode:
- 1978iht.....5..239E
- Keywords:
-
- Porous Walls;
- Suction;
- Thermal Boundary Layer;
- Turbulent Flow;
- Graphs (Charts);
- Numerical Analysis;
- Prandtl Number;
- Wall Flow;
- Fluid Mechanics and Heat Transfer