[mg85176] Specifiying finiteness condition using NDSolve

[pradeep <pradeep at purdue.edu>]

Hello all,
I am trying to solve a PDE for unsteady laminar flow through a circular
tube using NDSolve, but am having difficulty in implementing one of the
boundary conditions which states that the velocity at all time, at r=0
(centre of the tube), is FINITE. How do I specify the fact that the
function i am solving for has a value that is finite at a specific point
in the domain in mathematica?

Thanks in advance!

Pradeep
Purdue University