## Wednesday, May 3, Lori Student Center, Room 228, 11:20am

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Flow in a small aspect ratio Taylor-Couette device:
Experimental and numerical comparisons

#### Simon Tavener

Department of Mathematics

Colorado State University

I will discuss the "Taylor-Couette" flow of a Newtonian fluid in
the annular gap between two concentric cylinders. Arne Schulz at
the University of Kiel has performed a series of experiments
using short cylinders whose rotation rates can be set independently.
The top and bottom surfaces of his experimental apparatus are
stationary. Convincing agreement between experiments and
computations based on numerical bifurcation techniques can be
obtained for steady, axisymmetric flows over a range of aspect
ratios and Reynolds numbers. Earlier studies in an apparatus with
a stationary outer cylinder suggest that the same will be true for
the onset of singly periodic flows. Further progress depends upon
the development and implementation of efficient numerical
techniques for computing periodic solutions and determining
their stability.

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Please direct any comments to

Gerhard Dangelmayr at gerhard@math.colostate.edu.