reverse flow

bob12 · November 10, 2009, 10:25

hi everyone
i have a simulation of two different fluids, flowing inside a tube and one outside.
i set the simulation with k-e model and pressure based, the time is steady.
the problem is that it report reverce flow in __ faces on outflow.
the boundary condiction is: two velocity inlet and two outflow.
then step of simulation is inizializate all zone.
what did i do wrong?
thank you

vandadt · November 10, 2009, 11:19

Hi
check for the outflow bondaries locations. its better to set outflow in fully developed region. if your outlets are in developing region use pressure-outlet condition. else, this is a warning and should be disappear.
Regards,

bob12 · November 10, 2009, 13:37

thank you,
tomorrow i try the simulation with a boundary condiction on outlow pressure.

November 10, 2009, 10:25	reverse flow	#1
bob12 Member Join Date: Oct 2009 Location: Italy Posts: 88 Rep Power: 16	hi everyone i have a simulation of two different fluids, flowing inside a tube and one outside. i set the simulation with k-e model and pressure based, the time is steady. the problem is that it report reverce flow in __ faces on outflow. the boundary condiction is: two velocity inlet and two outflow. then step of simulation is inizializate all zone. what did i do wrong? thank you

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November 10, 2009, 11:19		#2
vandadt New Member Vandad Talimi Join Date: Oct 2009 Posts: 12 Rep Power: 16	Hi check for the outflow bondaries locations. its better to set outflow in fully developed region. if your outlets are in developing region use pressure-outlet condition. else, this is a warning and should be disappear. Regards,

November 10, 2009, 13:37		#3
bob12 Member Join Date: Oct 2009 Location: Italy Posts: 88 Rep Power: 16	thank you, tomorrow i try the simulation with a boundary condiction on outlow pressure.