[ff3d-users] Navier-Stokes problem

[Thomas B]

Hi!
I tried to use FreeFEM3D to simulate an object being pulled through water.
First I used the example "navier-stokes.ff" provided with FreeFEM3D but 
I had several problems with the "eps" parameter. After searching in the 
archive of this mailing list I found the thread started by Dominique 
Deloisin just a few days ago and the nice solution by Stephan.
But I still have some problems:
1) Is it possible to simulate the case described above by assuming that 
the object rests while water is moving? The flow is assumed to be 
stationary.
2) If yes, how can you compute the force acting on the object if the 
algorithm forces the pressure to be quite random in the object itself? 
It seems to be impossible to  accurately interpolate the pressure on the 
actual surface of the object.

Best regards,
Thomas