[Paraview] PV 3.10.1 integration over a surface
How does one compute the integral of P Normal ds ? where Normal is the surface normal vector click on integrate variables computes the integral of P ds I would like Fx = integral of P nx ds where nx ds is the surface area normal to the x-direction. Hope my question is clear. Stephen p.s. The surface in question is a cylinder ___ 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
Re: [Paraview] PV 3.10.1 integration over a surface
One way is to use the calculator filter to multiply the pressure by the normal to get force per unit area on the cylinder. Then you can use the integrate variables filter to get the total force on it. If you don't have normals on your cylinder, you can use the generate surface normals filter but that only works for polydata. The extract surface should get you from any other data set to the polydata you want. Andy On Sun, Jun 19, 2011 at 4:01 AM, Stephen Wornom stephen.wor...@inria.frwrote: How does one compute the integral of P Normal ds ? where Normal is the surface normal vector click on integrate variables computes the integral of P ds I would like Fx = integral of P nx ds where nx ds is the surface area normal to the x-direction. Hope my question is clear. Stephen p.s. The surface in question is a cylinder ___ 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 ___ 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
Re: [Paraview] PV 3.10.1 integration over a surface
Andy Bauer wrote: One way is to use the calculator filter to multiply the pressure by the normal to get force per unit area on the cylinder. Then you can use the integrate variables filter to get the total force on it. If you don't have normals on your cylinder, you can use the generate surface normals filter but that only works for polydata. The extract surface should get you from any other data set to the polydata you want. I have cell normals (vector) next I do cell data to point data extract surface when I do calculator, the cell normal vector is not in the list. How do I get the cell normal vector in the calculator list? Thanks for your help, Stephen Andy On Sun, Jun 19, 2011 at 4:01 AM, Stephen Wornom stephen.wor...@inria.fr mailto:stephen.wor...@inria.fr wrote: How does one compute the integral of P Normal ds ? where Normal is the surface normal vector click on integrate variables computes the integral of P ds I would like Fx = integral of P nx ds where nx ds is the surface area normal to the x-direction. Hope my question is clear. Stephen p.s. The surface in question is a cylinder ___ Powered by www.kitware.com http://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 -- stephen.wor...@inria.fr 2004 route des lucioles - BP93 Sophia Antipolis 06902 CEDEX Tel: 04 92 38 50 54 Fax: 04 97 15 53 51 attachment: stephen_wornom.vcf___ 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
Re: [Paraview] PV 3.10.1 integration over a surface
I think the cell normals that you have are generated for visualization and not really part of your data set that's directly outputted from your filter. So when you do cell data to point data you still don't have the normals in there. Did you try using the extract surface and generate surface normals filters? On Sun, Jun 19, 2011 at 12:52 PM, Stephen Wornom stephen.wor...@inria.frwrote: Andy Bauer wrote: One way is to use the calculator filter to multiply the pressure by the normal to get force per unit area on the cylinder. Then you can use the integrate variables filter to get the total force on it. If you don't have normals on your cylinder, you can use the generate surface normals filter but that only works for polydata. The extract surface should get you from any other data set to the polydata you want. I have cell normals (vector) next I do cell data to point data extract surface when I do calculator, the cell normal vector is not in the list. How do I get the cell normal vector in the calculator list? Thanks for your help, Stephen Andy On Sun, Jun 19, 2011 at 4:01 AM, Stephen Wornom stephen.wor...@inria.frmailto: stephen.wornom@inria.**fr stephen.wor...@inria.fr wrote: How does one compute the integral of P Normal ds ? where Normal is the surface normal vector click on integrate variables computes the integral of P ds I would like Fx = integral of P nx ds where nx ds is the surface area normal to the x-direction. Hope my question is clear. Stephen p.s. The surface in question is a cylinder __**_ Powered by www.kitware.com http://www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/**opensource/opensource.htmlhttp://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/**ParaViewhttp://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/**mailman/listinfo/paraviewhttp://www.paraview.org/mailman/listinfo/paraview -- stephen.wor...@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
Re: [Paraview] PV 3.10.1 integration over a surface
Hi, my understanding is that when you used CellDataToPointData filter, the cell data are removed and thus they don't appear in the Calculator. The CellDataToPointData filter has a Pass Cell Data option that will keep the original data in the pipeline. However, I didn't understand from where you got your normals: are they generated from Generate Surface Normals filter or outside ParaView? When you load your data, do you see the CellData array in the information tab of your data? Best regards, Jerome 2011/6/19 Andy Bauer andy.ba...@kitware.com I think the cell normals that you have are generated for visualization and not really part of your data set that's directly outputted from your filter. So when you do cell data to point data you still don't have the normals in there. Did you try using the extract surface and generate surface normals filters? On Sun, Jun 19, 2011 at 12:52 PM, Stephen Wornom stephen.wor...@inria.frwrote: Andy Bauer wrote: One way is to use the calculator filter to multiply the pressure by the normal to get force per unit area on the cylinder. Then you can use the integrate variables filter to get the total force on it. If you don't have normals on your cylinder, you can use the generate surface normals filter but that only works for polydata. The extract surface should get you from any other data set to the polydata you want. I have cell normals (vector) next I do cell data to point data extract surface when I do calculator, the cell normal vector is not in the list. How do I get the cell normal vector in the calculator list? Thanks for your help, Stephen Andy On Sun, Jun 19, 2011 at 4:01 AM, Stephen Wornom stephen.wor...@inria.frmailto: stephen.wornom@inria.**fr stephen.wor...@inria.fr wrote: How does one compute the integral of P Normal ds ? where Normal is the surface normal vector click on integrate variables computes the integral of P ds I would like Fx = integral of P nx ds where nx ds is the surface area normal to the x-direction. Hope my question is clear. Stephen p.s. The surface in question is a cylinder __**_ Powered by www.kitware.com http://www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/**opensource/opensource.htmlhttp://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/**ParaViewhttp://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/**mailman/listinfo/paraviewhttp://www.paraview.org/mailman/listinfo/paraview -- stephen.wor...@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 ___ 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
