Search found 10 matches

by Dylan van der Schoot
Wed Apr 17, 2019 1:44 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Prescribed velocities boundary
Replies: 5
Views: 396

Re: Prescribed velocities boundary

Hi David,

Thanks for your reply, I've filed the bug on the GitHub.

Thanks in advance for the help,

Dylan
by Dylan van der Schoot
Tue Apr 16, 2019 1:14 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Prescribed velocities boundary
Replies: 5
Views: 396

Re: Prescribed velocities boundary

I found the problem. For some reason, if I apply inflation layers in my mesh, the mapping of the velocity profile on the inlet boundary introduces non-axial velocity components (approx. 10^3 times smaller than the velocity in the axial direction). When I'm not using inflation layers in my mesh, this...
by Dylan van der Schoot
Tue Apr 16, 2019 12:35 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Prescribed velocities boundary
Replies: 5
Views: 396

Re: Prescribed velocities boundary

Hi,

Thanks for your reply. I've checked the bct.dat file and the prescribed velocities in the non-axial direction are not exactly zero. I've attached the file here: https://we.tl/t-zVyxgqr3Oq
Any idea what causes this?
by Dylan van der Schoot
Mon Apr 15, 2019 4:44 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Prescribed velocities boundary
Replies: 5
Views: 396

Prescribed velocities boundary

Hi all, When I'm applying a steady parabolic flow on the inlet, I see that for some reason in the calculation of this profile not only a velocity in the required direction is present, but there is also a small parabolic velocity profile in the other two directions (It is in the order of 10^-4 of the...
by Dylan van der Schoot
Mon Apr 01, 2019 6:51 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Solver blows up when applying inflation layers
Replies: 5
Views: 366

Re: Solver blows up when applying inflation layers

Hi Weiguang Yang, Thanks for your response! I've gathered some results and combined them in the excel sheet provided here: https://we.tl/t-NtjtI08dsk For all the simulations the residuals were below 10^-3, so no blowup is occuring in the simulations. Pressure is for instance also varying quite a lot...
by Dylan van der Schoot
Wed Mar 27, 2019 6:59 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Solver blows up when applying inflation layers
Replies: 5
Views: 366

Re: Solver blows up when applying inflation layers

Hi David, I've updated my version of Simvascular, and the meshes with inflation layers are now generated without bad elements. So that's great! However, I am now encountering another problem, that is that I can't seem to reach grid convergence. For testing purposes, I am simulating with a simple str...
by Dylan van der Schoot
Fri Mar 15, 2019 4:18 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Solver blows up when applying inflation layers
Replies: 5
Views: 366

Solver blows up when applying inflation layers

Hi all, I'm encountering a problem when trying to solve flows on a mesh with inflation layers on the wall. When I try to solve the flow in a simple straight tube with, for example, 2 inflation (boundary) layers on the wall, the solver blows up. This is not the case when I'm not using inflation layer...
by Dylan van der Schoot
Mon Mar 11, 2019 3:25 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Custom analytical shape inlet velocity profile
Replies: 2
Views: 235

Custom analytical shape inlet velocity profile

Hi all,

I was wondering if it is possible to use a custom analytical shape for the inlet velocity profile?
I want to apply patient specific velocity profiles, obtained with 4D-MRI, to the inlet of my geometry.

Thanks in advance!
by Dylan van der Schoot
Fri Mar 01, 2019 3:47 am
Forum: SimVascular: Cardiovascular Modeling and Simulation Application
Topic: Problem with running SVsolver in parallel
Replies: 4
Views: 380

Problem with running SVsolver in parallel

Hi all, I'm trying to run svsolver in parallel on 24 cores Ubuntu 18.04 system. I use the command: mpiexec -n 24 svsolver solver.inp. Instead of running 24 processes in parallel, it runs 24 processes sequentially. Also it doesn't create the 24-procs-case directory as we would expect. Anyone knows ho...