Add scalar "shift" to an already computed simulation

jcoelho5 · September 12, 2022, 10:39

Hi all,

does anyone know if it is possible to modify a field by adding/subtracting a scalar shift to an already computed simulation?

Example: I computed a simulation with one BC of pressureOutlet of 5 bar. If I want to repeat the simulation with a new BC of 15 bar instead, if I continue the simulation from the previous (with a 5 bar BC), the transient would take too much time, and (when possible to use) the steady state simulation also tend to fail. My idea was to add 10 bar to all the scalar pressure field, and proceed to simulate from that state.

Thanks in advance for any suggestions.

Best regards to the forum!

jherb · September 13, 2022, 20:00

With funkySetFields you could change the internal field, but I have not found a method to do this also for the boundary files (funkySetFields will overwrite them with zeroGradient boundaries if you do not turn off modifying boundaries alltogether)

September 12, 2022, 10:39	Add scalar "shift" to an already computed simulation	#1
jcoelho5 New Member Joao Coelho Join Date: Jun 2021 Posts: 23 Rep Power: 5	Hi all, does anyone know if it is possible to modify a field by adding/subtracting a scalar shift to an already computed simulation? Example: I computed a simulation with one BC of pressureOutlet of 5 bar. If I want to repeat the simulation with a new BC of 15 bar instead, if I continue the simulation from the previous (with a 5 bar BC), the transient would take too much time, and (when possible to use) the steady state simulation also tend to fail. My idea was to add 10 bar to all the scalar pressure field, and proceed to simulate from that state. Thanks in advance for any suggestions. Best regards to the forum! jherb likes this.

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September 13, 2022, 20:00		#2
jherb Senior Member Joachim Herb Join Date: Sep 2010 Posts: 650 Rep Power: 22	With funkySetFields you could change the internal field, but I have not found a method to do this also for the boundary files (funkySetFields will overwrite them with zeroGradient boundaries if you do not turn off modifying boundaries alltogether)