Search found 1674 matches

by David Parker
Fri Aug 23, 2024 12:54 pm
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Boundary Layer on a specific Wall
Replies: 1
Views: 72

Re: Boundary Layer on a specific Wall

Hello, is there a way that I can use to exclude a specific wall in my geometry to not have the boundary layer meshing?! The boundary layer meshing was implemented for anatomic geometry so sharp corners cause the problems you are seeing. There is no way to identify which faces to use for boundary lay...
by David Parker
Thu Aug 22, 2024 10:55 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: There is a bug in svFSIplus
Replies: 1
Views: 104

Re: There is a bug in svFSIplus

Hi Lina,

Thanks for the detailed description of this problem!

Please open a GitHub Issue for this problem so the development team can track it.

Cheers,
Dave
by David Parker
Wed Aug 21, 2024 6:21 pm
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Advice on solving convection-diffusion equation
Replies: 2
Views: 118

Re: Advice on solving convection-diffusion equation

Hi Ignacio, The svFSIplus code has support for an advection-diffusion equation, see the dye_AD example. To simulate convection set the Coupled parameter to true <Add_equation type="scalarTransport" > <Coupled> true </Coupled> ... </Add_equation> Btw, any new solver development should be done in the ...
by David Parker
Wed Aug 21, 2024 4:25 pm
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Bad Cells
Replies: 3
Views: 139

Re: Bad Cells

Hi Stanley, Thanks for the link to the SV documentation, learn something new every day! I did not even notice this error when experimenting with the data, should be a popup really. It's not clear in the documentation what is meant by triangles that have more than one neighbor , triangles will have s...
by David Parker
Tue Aug 20, 2024 10:47 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Bad Cells
Replies: 3
Views: 139

Re: Bad Cells

Hi Stanley,

I was able to create a model using all of the segmentations on MacOS 13.5 M2.

I'm not familiar with the bad cell error. Is this coming from an SV popup window ?

Note that this project is segmented poorly and the resulting model geometry is not smooth.

Cheers,
Dave
by David Parker
Tue Aug 13, 2024 10:11 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: In Youtube Tutorial(13)
Replies: 1
Views: 101

Re: In Youtube Tutorial(13)

Hello,

It seems that you don't have svSolver program installed. Download and install the 2019 version.

Cheers,
Dave
by David Parker
Tue Aug 13, 2024 10:09 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Unable to import dicom image
Replies: 1
Views: 85

Re: Unable to import dicom image

Hello,

Is this an error message from SimVascular? What version and which platform?

What is the source of the DICOM files: CT, MRI ?

Cheers,
Dave
by David Parker
Fri Aug 09, 2024 2:03 pm
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: turbulent kinetic energy and residence time in aneurysms
Replies: 1
Views: 196

Re: turbulent kinetic energy and residence time in aneurysms

Hello,

There is no output option for turbulent kinetic energy or calculate residence time.

You could write a Python script or maybe use ParaView to calculate these.

Cheers,
Dave
by David Parker
Fri Aug 09, 2024 1:54 pm
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Example scripts for command-line meshing
Replies: 5
Views: 602

Re: Example scripts for command-line meshing

Hello, The TetGen (see https://simvascular.github.io/documentation/python_interface.html#meshing_module) describes the get_surface() method for the TetGen class that returns a vtkPolyData object containing the surface mesh with face IDs. mesh_surface = mesher.get_surface() file_name = "cylinder-mesh...
by David Parker
Fri Aug 02, 2024 1:08 pm
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: experimental (MRI) backflow not described by simulations
Replies: 3
Views: 417

Re: experimental (MRI) backflow not described by simulations

Hello, The proper solution would be to model the renal vessels with their outflow boundary as far away from the junction with the aorta as possible. The backflow stabilization correction is only applied at the outlet boundaries. You also need to understand what might could be causing the backflow. I...