fixing the amount of air and comparing temperature distributions of different designs

rskrishna87 · April 15, 2011, 09:17

Hi,

I have a general doubt.In a jet impingement cooling model.I am trying to vary the desing of the model.i.e introduce dimples and bumps.Then i am making the bulk mass flow at the outlet equal in the cfx setup.But still the bulk mass flow at the inlet is varying.Is it possible to make it also equal.I am giving all the other boundary conditions same in the CFX-Setup for different designs. Can you please let me know how can you fix the amount of air in the model. Should i change even my inlet boundary condition?.

Thanks in advance,

Krishna

ghorrocks · April 16, 2011, 07:37

For a converged steady state simulation with no mass sources/sinks, the flow in the inlets equals the flow out the outlets. If they do not match then your simulation is not converged.

April 15, 2011, 09:17	fixing the amount of air and comparing temperature distributions of different designs	#1
rskrishna87 Member Join Date: Jan 2011 Posts: 37 Rep Power: 15	Hi, I have a general doubt.In a jet impingement cooling model.I am trying to vary the desing of the model.i.e introduce dimples and bumps.Then i am making the bulk mass flow at the outlet equal in the cfx setup.But still the bulk mass flow at the inlet is varying.Is it possible to make it also equal.I am giving all the other boundary conditions same in the CFX-Setup for different designs. Can you please let me know how can you fix the amount of air in the model. Should i change even my inlet boundary condition?. Thanks in advance, Krishna

April 16, 2011, 07:37		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	For a converged steady state simulation with no mass sources/sinks, the flow in the inlets equals the flow out the outlets. If they do not match then your simulation is not converged.