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- Title
TURBULENCE STRUCTURE FOR PLANE POISEUILLE-COUETTE FLOW AND IMPLICATIONS FOR DRAG REDUCTION OVER SURFACES WITH SLIP.
- Authors
Spencer, Nicholas B.; Lee, Lloyd L.; Parthasarathy, Ramkumar N.; Papavassiliou, Dimitrios V.
- Abstract
Direct numerical simulations were used to simulate plane channel and plane Poiseuille-Couette flows. For Poiseuille-Couette flow, the walls of the channel were moving with a specified velocity. This is equivalent to forcing a slip velocity at the wall of the channel, and such flow behaviour can be viewed as the effect due to an ultra-hydrophobic wall. It was found that the location of the zero Reynolds stress value shifted towards the wall moving in the streamwise direction. The near-wall eddies were found to be longer and weaker than for the plane-Poiseuille channel flow. It appears that such an eddy structure can lead to turbulence drag reduction.
- Subjects
NUMERICAL analysis; SPEED; TURBULENCE; DRAG (Aerodynamics); SIMULATION methods &; models; SURFACES (Technology); HYDROPHOBIC surfaces
- Publication
Canadian Journal of Chemical Engineering, 2009, Vol 87, Issue 1, p38
- ISSN
0008-4034
- Publication type
Article
- DOI
10.1002/cjce.20136