Hello,

I am curious what the units of Shear Constant that we prescribe in our deformable constant wall simulations is in terms of CGS. I notice that in the tutorials they mention that the default value is 0.833, so i was curious was units this is in CGS, or if the value is unitless?

Thanks,
Joanne

Hello, I am running a rigid wall simulation, prescribing pulsatile flow to the input (aorta model). I am running the simulation through SV GUI, using svPre as the solver. For some reason, in every simulation, i get a result that shows additive pressures over the course of multiple cardiac cycles, in...

Hi David,

To follow up on the question, how do I know which units my model is being measured in? I.e., when i create the model on SV, i am measuring things to be in mm. Should my RCR conditions not be in terms of dynes/sec/cm5, but instead in terms of dynes/sec/mm5?

Another note -- i notice my pressure waveforms are additive over cycles, rather than stabilizing over multiple cycles. Any idea as to why this might be happening?

Hello David, Thanks for the suggestion. I reran the simulation for 3 cardiac cycles, assigning a steady inflow. The velocities I get as output as not close to the flow file values of 100 cc/sec. The velocity vectors also look a bit odd. The pressures are also impractically high, but this is likely d...

Hi David, I am using the NS solver, and the time steps are converging with proper residuals. I am running a rigid simulation with 5000 time steps, where each timestep is the length of a cardiac cycle (0.435 secs). My mesh is fine, with 249,000 elements. I ran the simulation for 5 cardiac cycles. I a...

Hello, I am attempting to run a rigid wall simulation through SV GUI. I assign a pulsatile parabolic flow profile to my input, assigning the data points from one cardiac cycle of flow as the flow file. Values are negated to represent flow opposite the normal. My RCR values are similar ranges as thos...

Hello,

I would like to follow up on this question, as I'm still struggling to figure out the issue. thanks!

Hello, I am running an svFSI simulation, with rigid wall conditions and RCR BCs, as the first step in a prestress- fluid structure interaction workflow. I ran my simulation for 5000 time steps (5 cardiac cycles). When I plot the velocities outputted from the simulation, i get reasonable results: inl...

Hello, I am following the workflow outlined in this example: https://github.com/SimVascular/svFSI-Tests/tree/master/07-fsi/ale/04-pipe_prestress to conduct svFSI prestress simulations. I am conducting a rigid, prestress, and then final FSI simulation according to the workflow. For the final overall ...