Problems to set Variable Pressure with Deformable Wall condition
Posted: Fri Mar 27, 2020 10:43 am
Hello,
I am currently working on a 3D simulation of an aortic vessel. I was able to properly simulate the unsteady condition by using an inflow wave, the windkessel model and the rigid wall condition.
However, when I change the rigid wall condition in a deformable wall condition, the results does not seem to consider the windkessel parameters which I imposed in "Inlet and Outlet BCs" section anymore, but they tend to flatten out to the unique value of pressure that I must defined in the wall properties section, as show in the attached figures.
The last commands in the .svpre file appears like this:
...
deformable_wall_vtp mesh-complete/walls_combined.vtp
deformable_thickness 0.2
deformable_E 6.04e6
deformable_nu 0.5
deformable_kcons 0.833333
deformable_pressure 126000
deformable_solve_displacements
wall_displacements_write_vtp displacement.vtp
write_geombc geombc.dat.1
write_restart restart.0.1
...
Looking at the svPre commands at page https://simvascular.github.io/archiveFl ... olverSec71, in the " Deformable walls with uniform thickness and elastic modulus" section, I can understand there is the possibility to change the line "deformable_pressure 126000", in order to read a file in which pressure corresponds to the proper variability through time. Is it the correct approach or is there another way to get the outlet variable pressure? Any suggestions are well appreciated.
Thanks in advance
Michela
I am currently working on a 3D simulation of an aortic vessel. I was able to properly simulate the unsteady condition by using an inflow wave, the windkessel model and the rigid wall condition.
However, when I change the rigid wall condition in a deformable wall condition, the results does not seem to consider the windkessel parameters which I imposed in "Inlet and Outlet BCs" section anymore, but they tend to flatten out to the unique value of pressure that I must defined in the wall properties section, as show in the attached figures.
The last commands in the .svpre file appears like this:
...
deformable_wall_vtp mesh-complete/walls_combined.vtp
deformable_thickness 0.2
deformable_E 6.04e6
deformable_nu 0.5
deformable_kcons 0.833333
deformable_pressure 126000
deformable_solve_displacements
wall_displacements_write_vtp displacement.vtp
write_geombc geombc.dat.1
write_restart restart.0.1
...
Looking at the svPre commands at page https://simvascular.github.io/archiveFl ... olverSec71, in the " Deformable walls with uniform thickness and elastic modulus" section, I can understand there is the possibility to change the line "deformable_pressure 126000", in order to read a file in which pressure corresponds to the proper variability through time. Is it the correct approach or is there another way to get the outlet variable pressure? Any suggestions are well appreciated.
![Very Happy :D](./images/smilies/icon_e_biggrin.gif)
Thanks in advance
Michela