Unsteady ramp inlet velocity

alicezanella · March 17, 2021, 13:56

Hello,

I was wondering if it's possible to add a ramp inlet velocity to an unsteady simulation.

I would like for the velocity to grow for the first 2s as a ramp.

Thank you for your help,

Alice

koray · March 21, 2021, 14:09

Hi there, "Laminar Backward-facing Step" tutorial might be helpful.

TKatt · March 23, 2021, 06:06

Hi,

From the code it looks like the method of prescribing inlet profiles is possible for each time step. In the mentioned tutorial https://su2code.github.io/tutorials/Inc_Laminar_Step/ it is done for a steady state simulation.

For unsteady you would add a 'inlet_filename' + '_00000.dat' (+ _00001.dat and so on) extension that represent the time iteration. so one inlet file is loaded each timestep. I recommend putting those in an extra folder and then INLET_FILENAME= folder/inlet_filename in the config to not clutter everything

Not really the most elegant way and requires a bit of (most likely python) scripting but it is the most flexibel option imo.

hope that helps

Cheers, Tobi

March 17, 2021, 13:56	Unsteady ramp inlet velocity	#1
alicezanella New Member Alice Zanella Join Date: Oct 2019 Posts: 9 Rep Power: 7	Hello, I was wondering if it's possible to add a ramp inlet velocity to an unsteady simulation. I would like for the velocity to grow for the first 2s as a ramp. Thank you for your help, Alice

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March 21, 2021, 14:09		#2
koray New Member Join Date: Nov 2012 Posts: 18 Rep Power: 14	Hi there, "Laminar Backward-facing Step" tutorial might be helpful.

March 23, 2021, 06:06		#3
TKatt Member na Join Date: Jul 2018 Posts: 90 Rep Power: 8	Hi, From the code it looks like the method of prescribing inlet profiles is possible for each time step. In the mentioned tutorial https://su2code.github.io/tutorials/Inc_Laminar_Step/ it is done for a steady state simulation. For unsteady you would add a 'inlet_filename' + '_00000.dat' (+ _00001.dat and so on) extension that represent the time iteration. so one inlet file is loaded each timestep. I recommend putting those in an extra folder and then INLET_FILENAME= folder/inlet_filename in the config to not clutter everything Not really the most elegant way and requires a bit of (most likely python) scripting but it is the most flexibel option imo. hope that helps Cheers, Tobi