[slimmsk]

Hi everyone, I am trying to write a MATLAB code that allows me to visualize the iso-speed found by piercy in 1933. Piercy was based on studies of Macdonald (1893) developed the equation for speed.
Visualization of the problem has been addressed by Mikhail Dimitrov Mikhailov in this link

http://demonstrations.wolfram.com/La...ccentricTubes/

But I need not only speed but also iso-speeds at each point between the two cylinders. I am trying to validate a numerical score performed by CFD software.
The code that I have developed gives me strange things.
I'm trying to programmed equation No. 4 in Piercy
I uploaded two articles in the site Scribd

Piercy : http://fr.scribd.com/doc/110309079
Macdonald 1893 : http://fr.scribd.com/doc/110310057


thank you