question about ANSYS Fluent Execute Commands

cfd-jhz · December 29, 2020, 00:05

Hi,
I have a transient CFD case in which 5 zones need to be activated and deactivated in a sequential way. To establish initial condition, a steady-state case is first simulated in which the 1st zone is deactivated and other 4 zones are activated. During the transient simulation:
at time step=100, 1st zone is activated, and 2nd zone is deactivated.
at time step=200, 2nd zone is activated, and 3rd zone is deactivated.
at time step=300, 3rd zone is activated, and 4th zone is deactivated.
at time step=400, 4th zone is activated, and 5th zone is deactivated.
As you can see, the 5 door zones are activated and deactivated in a sequential way and each door zone is activated/deactivated only one time. But in Execute Commands, it seems that I can only specify the calculation activities in a repetitive way, i.e. every * iterations or every * time steps. Could you please kindly suggest if there are any ways in Fluent to handle this CFD case or I have to do it manually?
Thanks,
jhz

AlexanderZ · December 29, 2020, 03:19

you may put "if statement condition" to check time moment
cause seems like you know open/close time moments from the very beginning

December 29, 2020, 00:05	question about ANSYS Fluent Execute Commands	#1
cfd-jhz New Member Join Date: Dec 2020 Posts: 2 Rep Power: 0	Hi, I have a transient CFD case in which 5 zones need to be activated and deactivated in a sequential way. To establish initial condition, a steady-state case is first simulated in which the 1st zone is deactivated and other 4 zones are activated. During the transient simulation: at time step=100, 1st zone is activated, and 2nd zone is deactivated. at time step=200, 2nd zone is activated, and 3rd zone is deactivated. at time step=300, 3rd zone is activated, and 4th zone is deactivated. at time step=400, 4th zone is activated, and 5th zone is deactivated. As you can see, the 5 door zones are activated and deactivated in a sequential way and each door zone is activated/deactivated only one time. But in Execute Commands, it seems that I can only specify the calculation activities in a repetitive way, i.e. every * iterations or every * time steps. Could you please kindly suggest if there are any ways in Fluent to handle this CFD case or I have to do it manually? Thanks, jhz

December 29, 2020, 03:19		#2
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	you may put "if statement condition" to check time moment cause seems like you know open/close time moments from the very beginning __________________ best regards ****************************** press LIKE if this message was helpful

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