ROTATING FLOWS OVER A ROTATING DISK FOR A CLASS OF NON-NEWTONIAN FLUIDS.
NAVAL WEAPONS LAB DAHLGREN VA
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Axisymmetric rotating flows over a rotating disk for Non-Newtonian fluids of Reiner-Rivlin type are calculated by means of an adjustable local boundary layer approximation. Variation of the dynamic similarity parameter, which characterizes the Non-Newtonian fluid, shows that secondary motions of stagnation, wake or cell type can exist. The beginning of instability in Bodewadt type motions, which indicates laminar flow separation from the surface of the disk, is shifted to higher Reynolds numbers for Non-Newtonian fluids. Furthermore, the largest tangential shear stress at the surface is exhibited by laminar flows of Newtonian fluids. Author
- Fluid Mechanics