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List:       paraview
Subject:    Re: [Paraview] PV 4.1.0 computing 3D lift and drag coefficients wing-body-nacelle combination
From:       Andy Bauer <andy.bauer () kitware ! com>
Date:       2014-04-25 14:02:23
Message-ID: CAMaOp+G2wSNnM1opQqShD-DH7PNTj9t8-Si3QhxcMC67xrzd8g () mail ! gmail ! com
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Hi Stephen,

After thresholding you'll have an unstructured grid again. Can you try
extract surface after that again to convert it to a polydata. Then you
should be able to generate surface normals. If you don't have gradients
available you'll want to compute them before you do the first extract
surface filter as well.

Regards,
Andy


On Fri, Apr 25, 2014 at 7:40 AM, Stephen Wornom <stephen.wornom@inria.fr>wrote:

> I do:
> - select extract surface
> - select connectivity
> - threshhold (to say what surface)
> I now have the surface of the wing and nacelle visible.
>
> To compute the lift and drag, I need to generate surface normals. But this
> filter is not active.
> How do I generate surface normals?
> Thanks,
> Stephen
>
> --
> stephen.wornom@inria.fr
> 2004 route des lucioles - BP93
> Sophia Antipolis
> 06902 CEDEX
>
> Tel: 04 92 38 50 54
> Fax: 04 97 15 53 51
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://www.paraview.org/mailman/listinfo/paraview
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>

[Attachment #5 (text/html)]

<div dir="ltr"><div><div>Hi Stephen,<br><br></div>After thresholding you&#39;ll have \
an unstructured grid again. Can you try extract surface after that again to convert \
it to a polydata. Then you should be able to generate surface normals. If you \
don&#39;t have gradients available you&#39;ll want to compute them before you do the \
first extract surface filter as well.<br> <br></div>Regards,<br>Andy<br></div><div \
class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Apr 25, 2014 at 7:40 AM, \
Stephen Wornom <span dir="ltr">&lt;<a href="mailto:stephen.wornom@inria.fr" \
target="_blank">stephen.wornom@inria.fr</a>&gt;</span> wrote:<br> <blockquote \
class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc \
                solid;padding-left:1ex">I do:<br>
- select extract surface<br>
- select connectivity<br>
- threshhold (to say what surface)<br>
I now have the surface of the wing and nacelle visible.<br>
<br>
To compute the lift and drag, I need to generate surface normals. But this filter is \
not active.<br> How do I generate surface normals?<br>
Thanks,<br>
Stephen<span class="HOEnZb"><font color="#888888"><br>
<br>
-- <br>
<a href="mailto:stephen.wornom@inria.fr" \
target="_blank">stephen.wornom@inria.fr</a><br> 2004 route des lucioles - BP93<br>
Sophia Antipolis<br>
06902 CEDEX<br>
                        <br>
Tel: 04 92 38 50 54<br>
Fax: 04 97 15 53 51<br>
<br>
</font></span><br>_______________________________________________<br>
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<br>
Visit other Kitware open-source projects at <a \
href="http://www.kitware.com/opensource/opensource.html" \
target="_blank">http://www.kitware.com/opensource/opensource.html</a><br> <br>
Please keep messages on-topic and check the ParaView Wiki at: <a \
href="http://paraview.org/Wiki/ParaView" \
target="_blank">http://paraview.org/Wiki/ParaView</a><br> <br>
Follow this link to subscribe/unsubscribe:<br>
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<br></blockquote></div><br></div>



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