Hello,
you may try to first project the velocity vector on the surface, so
that the normal components are zero, then compute the streamlines
using this velocity field. I did this with a velocity field which was
defined as a cell data, and the results are good (at least in my
case...).
Regards,
-Marzio
From: Richard GRENON <[email protected]>
Date: April 10, 2009 11:35:46 AM GMT+02:00
To: Jacques Papper <[email protected]>
Cc: [email protected]
Subject: Re: [Paraview] How to plot Surface StreamLines
Jacques Papper wrote:
I would try :
- diminishing the step size (in cell length)
- Putting a very high number of steps
- Decreasing the termination speed
I tried this. The best results are obtained with a step size of 0.01
cell length on my data,and I get always short peaces of surface
streamlines.
I discovered that the grid refinement was also an important parameter:
- when the grid is coarse at the seed point location, the surface
streamline stops after crossing only one or two cells.
- when the grid is well refined at the seed point location, the
surface streamline is longer and propagates over many cells, but it
never reaches the boundary of the surface.
So I think that the best workaround is to put many seed points all
over the surface. If someone has a better idea...
Best regards.
--
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:[email protected]
http://www.onera.fr
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