Flow units

[Sara BENCHARA]

Hi everyone,

For my simulations, I integrate an external model with dimensions corresponding to mm with the measurement tool (i.e. I obtain 30 mm for a structure that is 30 mm on the native images). I'd like to know whether I need to use the CGS system when implementing data (especially for the flow data). Should I implement a flow file in cm3/s or mm3/s?

Thanks

[David Parker]

Hello,

The SimVascular and the solvers don't assume any units. You just need to have model geometry, flow data and simulation parameters be consistent.

Cheers,
Dave

[Joanne Sarsam]

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?

[David Parker]

Hello,

SimVascular does not assume any units (see https://simvascular.github.io/documenta ... guide.html). Note that the default SV Simulation Tool Basic Parameters (e.g. density) are in CGS.

You will need to know what the length units are for your medical imaging data and make the simulation data and parameters consistent with that (i.e. use cm or mm).

Cheers,
Dave