If I need to draw streamlines with seed points within a user-defined ROI contour, would that be possible in Paraview? Would such a task need python/VTK scripting?
Is it possible to apply Glyph filter (or other) to analyse thermal flux vector on a thermal study? The thermal flux, on my case, is obtained by FLUX_ELGA, FLUX_ELNO and FLUX_NOEU from Code_Aster solver. Thanks a lot!
Nice video.But I am having difficuly in drawing all the streamlines in a rectangle channel with rectangle ribs.The streamlines around the ribs seem to be hidden.How can i show the streamlines around the ribs without increasing the resolution?
Hi Cyprien, I have a question when using StreamTracer filter. My case is 3D, so I first generate a 2D slice and then use high resolution line source seed type. The default line is from left bottom to right top. The strange thing is that only very few streamlines is generated around the seed line rather than distribute in all domain. I change the location of start and end point of the line, but results are similar. Could you please tell me how to generate streamlines within whole domain? Thanks!
@@Feaforall Hi Cyprien, thanks for your reply! I solve the problem by combining the filter Surface Vector and Stream Tracer, then the streamlines can be generated in whole 2d domain. And I use Glyph to generate arrows on each streamline. Thanks again for your excellent video!
I am having real trouble finding information on how to use programs like paraview to analyze photogrammetry models. Is this an unorthodox approach? I am trying to determine the drag coefficient with Normals_Y (models oriented along the Y) in place of Cd in the drag equation, but the results appear anomalous. No amount of internet searching turns up a straight forward answer. I see others using models with pressure vectors calculating drag in Paraview, that is the closest I've come, but how do you do this from a photogrammetry model?
First time I hear about photogrammetry, is your data similar to data coming from LiDAR Scanner ? Paraview has an app called LidarView, maybe you can have a look: www.paraview.org/lidarview/ Also I don’t think you can get the drag coefficient just like that by looking at data from a geometry model... you will have to do some simulation to get the physical data necessary... or is your data the results measured in wind tunnel?
@@Feaforall Thank you for your quick response. I am actually using photogrammetry models of small objects (replicas of ancient stone hunting tools to study their ballistics). I can scale, reorient and smooth them in meshlab, then load them into Paraview, which provides a promising view of drag along the surface and allows me to calculate the cross-section. But I cannot determine how to add the velocity vectors or flow parameters. No amount of searching turns up a straightforward approach because, it would seem, most people are working with models built in software with the vectors and dependent parameters built into the models (namely pressure). I have only come across tantalizing evidence that this could be done by writing a new filter in Paraview. It looks possible to analyze my models in Solidworks but I'd rather not buy a subscription. Still a poor student and the uni does not provide access.
@@devinpettigrew9273 Paraview is a software to post-process data. It can't calculate or simulate. To get velocity vectors, you need to do a CFD flow simulation on your model first, then calculate the velocity field around your object, then only you can import that into paraview to visualize it. There are free CFD software you can use, either open source (Code_saturne, OpenFoam), or Cloud-based (OnScale, Simscale,...).
Like I told you, this should the default, but it depends on your graphic card and how you have configured your install. I think there are some settings to force paraview to use GPU... google is your friend here.
![[ Paraview Tutorial 6 ] Understanding Various ways to Plot Data](http://i.ytimg.com/vi/e_XwbflJ4UE/mqdefault.jpg)
![[ Paraview Tutorial 6 ] Understanding Various ways to Plot Data](/img/tr.png)
![[ Paraview Tutorial 7 ] Exploring the different types of surface and volume representation](/img/n.gif)
thank you very very much you made it look so simple
Thank you for content. It helped me great.
Thank you sir it was really helpful
Very helpful 👍
When i drop my. vtk data into paraview and enter streamlines, i can't see vectors or generally anything. Which type of data do you need to put in?
If I need to draw streamlines with seed points within a user-defined ROI contour, would that be possible in Paraview? Would such a task need python/VTK scripting?
Is it possible to apply Glyph filter (or other) to analyse thermal flux vector on a thermal study? The thermal flux, on my case, is obtained by FLUX_ELGA, FLUX_ELNO and FLUX_NOEU from Code_Aster solver. Thanks a lot!
Nice video.But I am having difficuly in drawing all the streamlines in a rectangle channel with rectangle ribs.The streamlines around the ribs seem to be hidden.How can i show the streamlines around the ribs without increasing the resolution?
Thank you!
Hi
Cyprien, I have a question when using StreamTracer filter. My case is 3D, so I first generate a 2D slice and then use high resolution line source seed type. The default line is from left bottom to right top. The strange thing is that only very few streamlines is generated around the seed line rather than distribute in all domain. I change the location of start and end point of the line, but results are similar. Could you please tell me how to generate streamlines within whole domain? Thanks!
I think there is a parameter to increase the number of samples at the start location. Try to increase it and it should solve your problem
@@Feaforall Hi Cyprien, thanks for your reply! I solve the problem by combining the filter Surface Vector and Stream Tracer, then the streamlines can be generated in whole 2d domain. And I use Glyph to generate arrows on each streamline. Thanks again for your excellent video!
I am having real trouble finding information on how to use programs like paraview to analyze photogrammetry models. Is this an unorthodox approach? I am trying to determine the drag coefficient with Normals_Y (models oriented along the Y) in place of Cd in the drag equation, but the results appear anomalous. No amount of internet searching turns up a straight forward answer. I see others using models with pressure vectors calculating drag in Paraview, that is the closest I've come, but how do you do this from a photogrammetry model?
First time I hear about photogrammetry, is your data similar to data coming from LiDAR Scanner ? Paraview has an app called LidarView, maybe you can have a look: www.paraview.org/lidarview/
Also I don’t think you can get the drag coefficient just like that by looking at data from a geometry model... you will have to do some simulation to get the physical data necessary... or is your data the results measured in wind tunnel?
@@Feaforall Thank you for your quick response. I am actually using photogrammetry models of small objects (replicas of ancient stone hunting tools to study their ballistics). I can scale, reorient and smooth them in meshlab, then load them into Paraview, which provides a promising view of drag along the surface and allows me to calculate the cross-section. But I cannot determine how to add the velocity vectors or flow parameters. No amount of searching turns up a straightforward approach because, it would seem, most people are working with models built in software with the vectors and dependent parameters built into the models (namely pressure). I have only come across tantalizing evidence that this could be done by writing a new filter in Paraview. It looks possible to analyze my models in Solidworks but I'd rather not buy a subscription. Still a poor student and the uni does not provide access.
@@devinpettigrew9273 Paraview is a software to post-process data. It can't calculate or simulate. To get velocity vectors, you need to do a CFD flow simulation on your model first, then calculate the velocity field around your object, then only you can import that into paraview to visualize it. There are free CFD software you can use, either open source (Code_saturne, OpenFoam), or Cloud-based (OnScale, Simscale,...).
@@Feaforall thank you for the clarification. I searched a long while but this was never clear to me. And thanks for your great videos.
Is it possible to add only some stream tracers at certain positions?
Yes
@@Feaforall how ?
iam just getting one big vektor which points into two oposite directions xDDD
How can I use the GPU in paraview?
This is the case by default when you are using the paraview binaries, you can check by taking a look into Help->About->OpenGL Renderer
@@Feaforall I want paraview to use the GPU instead of the CPU for animation. Is that possible?
Like I told you, this should the default, but it depends on your graphic card and how you have configured your install. I think there are some settings to force paraview to use GPU... google is your friend here.