Closed loop system convergence problem

rtyme06 · September 14, 2023, 15:31

Hi Everyone,

I have a system with no inlet or outlet. The simulation domain is a room. Air is pushed into the room by a fan of an AC unit. The air leaves the room through a vent. A duct loops the air back to the fan inlet. I am not concerned about the temperature field for now.

I need some suggestions about how to initialize the system because running the simulation with the default hybrid initialization method fails to converge.

Thank you.

rtyme06 · September 14, 2023, 16:38

You need some idea about the flow in the domain. Then initialize the system using standard initialization with some approximate velocity or pressure. I just initialized the system with a velocity parallel to the fan inlet's normal direction and it worked.

All praise to Allah!

September 14, 2023, 15:31	Closed loop system convergence problem	#1
rtyme06 New Member raihan Join Date: Feb 2015 Posts: 10 Rep Power: 12	Hi Everyone, I have a system with no inlet or outlet. The simulation domain is a room. Air is pushed into the room by a fan of an AC unit. The air leaves the room through a vent. A duct loops the air back to the fan inlet. I am not concerned about the temperature field for now. I need some suggestions about how to initialize the system because running the simulation with the default hybrid initialization method fails to converge. Thank you.

September 14, 2023, 16:38	Solved!	#2
rtyme06 New Member raihan Join Date: Feb 2015 Posts: 10 Rep Power: 12	You need some idea about the flow in the domain. Then initialize the system using standard initialization with some approximate velocity or pressure. I just initialized the system with a velocity parallel to the fan inlet's normal direction and it worked. All praise to Allah!

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