[Paraview] PV 3.10.1 computing vorticity from vector field

[Adriano Gagliardi]

On this subject, it should also be possible to use the Python Calculator to
perform this function. Create a vector, U and obtain the curl of it by
using: curl(U). I think your version of Python must have numpy available,
though.

===================================

Adriano Gagliardi MEng PhD
Business Sector Leader
Computational Aerodynamics
Aircraft Research Association Ltd.
Manton Lane
Bedford

Tel: 01234 32 4644
E-mail: agagliardi at ara.co.uk
Url: www.ara.co.uk 

 

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From: paraview-bounces at paraview.org [mailto:paraview-bounces at paraview.org]
On Behalf Of Andy Bauer
Sent: 02 June 2011 17:42
To: gtg085x at mail.gatech.edu; stephen.wornom at inria.fr
Cc: ParaView list
Subject: Re: [Paraview] PV 3.10.1 computing vorticity from vector field


For computing vorticity, depending on the grid type you can also use the
Gradient of Unstructured Datasets filter.  There is an option to compute
vorticity for 3 component arrays (i.e. velocity).    It works on both point
data and cell data and the output will be the same type of field data.  I'm
about to change this filter so that it will work with all types of VTK
grids.

Andy


On Thu, Jun 2, 2011 at 12:29 PM, Tim Gallagher <tim.gallagher at gatech.edu>
wrote:


The output from the ComputeDerivatives is Cell Data. To do those things, you
want to make it Point Data with another CellDataToPointData filter.

The calculator would see it if you changed it from point data to cell data.
But since you want to do other stuff with it, add the interpolation filter
again and then it will appear with the rest of your point data.


Tim

----- Original Message -----
From: "Stephen Wornom" <stephen.wornom at inria.fr>

To: gtg085x at mail.gatech.edu
Cc: "ParaView list" <paraview at paraview.org>
Sent: Thursday, June 2, 2011 12:26:04 PM
Subject: Re: [Paraview] PV 3.10.1 computing vorticity from vector field

Tim Gallagher wrote:
> 1. If it's cell centered data, apply the CellDataToPointData filter. If
it's point data, skip this step
> 2. Apply the ComputeDerivatives filter. Choose your velocity vector as the
Vectors argument, set the Output Vector Type to Vorticity. I usually also
set Output Tensor Type to nothing unless you need it.
> 3. Hit apply.
>
Works correctly but what must I do to:
1 make a vector or contour plot
2 tracer plot or vorticity lines (like streamlines) plot?
The choice for these is only the velocity field that I read.
Calculator does not see the vorticity vector that was created.
Thanks for you help,
Stephen
> Tim
>
> ----- Original Message -----
> From: "Stephen Wornom" <stephen.wornom at inria.fr>
> To: paraview at paraview.org
> Sent: Wednesday, June 1, 2011 10:55:12 AM
> Subject: [Paraview] PV 3.10.1 computing vorticity from vector field
>
> What are the steps to compute the vorticity vector from the velocity
vector?
> Stephen
>
>


--
stephen.wornom at inria.fr
2004 route des lucioles - BP93
Sophia Antipolis
06902 CEDEX

Tel: 04 92 38 50 54
Fax: 04 97 15 53 51



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