Wendl's Result For Physical Devices
Actual co-axial cylinder devices used to create Couette flows have both curvature and finite geometry. The latter gives rise to increased drag in the wall region. A mathematical result that accounts for both of these aspects was given only recently by Michael Wendl. His solution takes the form of an expansion of modified (hyperbolic) Bessel functions of the first kind.
Read more about this topic: Couette Flow
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