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time-dependent RCR

Posted: Fri Jun 15, 2018 5:05 am
by alicovi
Hello,

I would like to perform a simulation with a time-dependent flow as inlet condition and a time-dependent pressure (RCR) as outlet condition.

Is it possible to set RCR values variable in time?

Is it possible to divide my simulation in more consecutive sub-simulations in order to set appropriate constant RCR values for each of them?
What is the right method to use the Restart file to connect two consecutive simulations (to impose the final results of the previous sub-simulation as the initial conditions of the following sub-simulation)?

Thank you all for your attention

Alice

Re: time-dependent RCR

Posted: Tue Jun 19, 2018 10:22 am
by wgyang
If you use rcrt.dat for your outlet boundary conditions, Rp, C and Rd are constant with time but Pd can be time-dependent, where subscripts p and d represent proximal and distal values respectively.
Simvascular's GenBC allows users to supply their own boundary conditions, similar to user-defined functions for Fluents.
For restart files, if the number of processors is unchanged, you can modify the numstart.dat to the step you want to restart. Otherwise, you can use postsolver to combine your last restart files into a single file.

"Last Step to restart.x.0, this options combines all the resart files of the last step (200) to a single restart file restart.200.0. which can be used to start a new simulation after renamed as restart.0.1."