[Paraview] How to plot Surface StreamLines

[Richard GRENON]

Hello,

This is an addition to my previous mail about Surface Streamlines:

After several tests, I can obtain some pieces of surface Streamlines on 
non planar surfaces (with the Wiki example for Custom Filter as with my 
own data). I have to use a very low value of "Initial Step Length" of 
the Custom StreamTracer, but I get always more or less short pieces of 
streamlines. never a full streamline from the seed point to the border 
of the surface. So I have to put many seed points all over the surface 
to cover the surface with pieces of streamlines in order to have an idea 
of the surface flow.

What I would like to get is a full streamline extending over the whole 
surface from  a given seed point.  As an example, let us consider the 
fuselage of an aircraft. I would like to put some seed points on a 
circle around the fuselage at a given location on the aircraft axis. The 
seed points may be obtained using Mask Point on a Slice of the fuselage 
by a plane at the desired location on the axis. Then a Surface Vectors 
filter is applied to the fuselage dataset and the Custom StreamTracer is 
applied to the Surface Vectors. But all I can obtain is always more or 
less short (depending of the "Initial Step Length" value) pieces of 
surface streamlines extending around the seed points.

Is there a way to have full surface streamlines with the existing 
filters other than including LC or some other software?

Thank you in advance for your help.

-- 
 Richard GRENON
 ONERA
 Departement d'Aerodynamique Appliquee - DAAP/ACI
 8 rue des Vertugadins
 92190 MEUDON - FRANCE
 phone : +33 1 46 73 42 17
 fax   : +33 1 46 73 41 46
 mailto:Richard.Grenon at onera.fr
 http://www.onera.fr