Non-newtonian Behavior of a Rotating-cylinder Induced Flow
نویسنده
چکیده
As a cylinder spins in an infinite media, viscous shear forces induce fluid motion and circular streamlines are generated. For Newtonian fluids, a simple analytical solution is possible and widely known. The hydrodynamics of nonNewtonian fluids, however, can be quite complex under such conditions. This paper investigates the behavior of a wide range of non-Newtonian fluids in the infinite cylinder problem. The effective viscosity is determined from Prazyna’s viscoplasticity model and the governing equation of momentum is solved numerically using an iterative control volume approach. It is found that velocity profiles for complex fluids can differ significantly from a constant viscosity analysis.
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