On turbulent secondary flows in pipes of noncircular cross-section
Abstract
The origin of turbulent secondary flow in pipes of noncircular cross section is examined from a theoretical standpoint. It is proven mathematically that secondary flows result from a nonzero difference in the normal Reynolds stresses on planes perpendicular to the axial flow direction. Furthermore, it is shown that the K-epsilon model of turbulence has no natural mechanism for the development of secondary flow while the currently popular second-order closure models do. The implications that this has on turbulence modeling are discussed briefly.
- Publication:
-
International Journal of Engineering Science
- Pub Date:
- 1982
- Bibcode:
- 1982IJES...20..863S
- Keywords:
-
- Computational Fluid Dynamics;
- Pipe Flow;
- Reynolds Stress;
- Secondary Flow;
- Turbulent Flow;
- Axial Flow;
- Flow Equations;
- Flow Geometry;
- K-Epsilon Turbulence Model;
- Mathematical Models;
- Stream Functions (Fluids);
- Three Dimensional Flow;
- Fluid Mechanics and Heat Transfer