[Paraview] Surface LIC Problem

[Magician]

Richard,


Sorry, that's my mistake.
The surfaces DON'T have non-zero vectors without slipping or moving wall.

I'm going to export surface vectors such as oilflow vector from solvers.


Magician


On Feb 14, 2014, at 23:00, Richard Grenon <richard.grenon at onera.fr> wrote:

> Hello.
> 
> What are these non-zero surface vectors without slipping or moving walls ?
> 
> With NS solvers, the velocity vector in an axis system bound to a wall should ALWAYS be zero at the wall (moving wall or not moving wall): this is the adherence condition.
> 
> As LIC needs a non zero vector at the wall in an axis system bound to the wall, you cannot use the velocity vector, and you MUST use the skin friction vector.
> 
> My NS solver gives the three components of the skin friction vector in an axis system bound to the wall as three scalar arrays. So I have to use the PV Calculator filter in order to build the vector array from these three scalar arrays, something like "Friction_vector = x_component*iHat+y_component*jHat+z_component*kHat"
> 
> But you may also use the Calculator filter to build the friction vector from the stress tensor and the normal vector at the wall. It depends on the output of your solver.
> 
> Richard
> 
> Le 14/02/2014 14:34, Magician a écrit :
>> Hi Burlen, Richard, Utkarsh,
>> 
>> 
>> Thanks for your advices.
>> 
>> I misunderstood that the Surface LIC Plugin should calculate
>> some kinds of the vector fields on surfaces.
>> My models are generated by NS solvers, so the surfaces have
>> non-zero vectors without slipping or moving wall.
>> 
>> For example, can I calculate surface friction vectors with ParaView?
>> I have flow fields and other physical constants.
>> 
>> 
>> # Extracting issue was solved by using Extract Subset filter.
>> # My meshes were structured grids of turbomachinery in this time,
>> # so all the walls can be extracted by the ijk coordinates.
>> 
>> 
>> Magician
>> 
> 
> 
> -- 
> 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
>