issues in working with vtp model files

farah deba · Post by **farah deba** » Tue Jul 11, 2017 4:39 am

hello everyone

i have arteriofemoral models in vtp format and i want to simulate them so can have pulsatile flow results.
as i have hollow models(without mri datasets), please guide me how can i create model faces and mesh so i can run simulation.

regards,
farah

Hongzhi Lan · Post by **Hongzhi Lan** » Tue Jul 11, 2017 12:37 pm

Hi farah

If you already a model in vtp, you can create a new project and import it, and extract faces and generate a mesh. You can checkout SimVascular documentation at www.simvascular.org. The website provides comprenhensive guides about modeling, meshing, simulation.
Importing models: http://simvascular.github.io/docsModelG ... tingModels
Extracting faces: http://simvascular.github.io/docsModelG ... yDataFaces

SimVascular Development Team

farah deba · Post by **farah deba** » Thu Jul 13, 2017 7:36 am

hi Lan

thanks for the links
Unfortunately . vtp model is making an error in attachment so i have attached an image of the model i wanted to create model for ,
i have created a new project and import the model but when in model module extract face option is not visible.
should i have to create path and segmentation before creating model faces ?

regards
farah

Hongzhi Lan · Post by **Hongzhi Lan** » Thu Jul 13, 2017 8:56 am

Hi farah,

I found you put a vtp in the "Images" folder. It may cause issues. This folder is supposed to be a container for images.

If you import a vtp model, it should be a PolyData model in SimVascular, but why is yours an OpenCASCADE model?

SimVascular Development Team

farah deba · Post by **farah deba** » Sat Jul 15, 2017 2:29 am

Hi Lin,

i have open the model as you guide me (as a model in SV and its polydata model)
but still my model didn't show any face in faces list even after applying extract faces option.
could you please guide me how can i create faces of my artery model if there aren't have separate faces itself.
images of opening my model in SV are attached here.

regards
farah

Hongzhi Lan · Post by **Hongzhi Lan** » Sat Jul 15, 2017 10:10 am

I think SV already provide the reason why it didn't work.

In the first figure, if you click yes, SV will triangulate the model surface.

In the second figure, the status bar in the bottom shows "Surface contains non-triangular elements! ...."

In the first step, if SV doesn't succeed in triangulating, you need convert it to a triangulated surface before importing into SV.

Hongzhi Lan
SimVascular Development Team

farah deba · Post by **farah deba** » Sat Jul 15, 2017 1:24 pm

ok but how can i do that ???

Hongzhi Lan · Post by **Hongzhi Lan** » Mon Jul 17, 2017 10:08 am

You can use the Triangulate filter in Paraview.

farah deba · Post by **farah deba** » Wed Aug 16, 2017 12:22 pm

Hello Lan

i have tried that triangular filter in paraview but still i'm unable to mesh my artery model in simvascular please guide me how can i make my 3d artery model able to mesh and simulate

regards
farah

Adam Updegrove · Post by **Adam Updegrove** » Wed Aug 16, 2017 12:37 pm

Hi Farah,

I noticed in your screenshots that you do not have faces extracted from your surface. You need to have faces in order to mesh. Use the modeling tab to first extract faces of your mesh.

Thanks!

SimVascular Development Team

issues in working with vtp model files

issues in working with vtp model files

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