Idea Gas calculation vs Simlation not same !!!!!

P9408 · October 31, 2010, 10:49

My project I try to heat up the air to make a higher pressure in the reactor's cavity. After I do the simulation I found Pressure increased aound 0.001 ATM but from my calculation by P1/P2 = T1/T2 ( Constant Volume) I found the pressure will be 1.25 ATM ( It mean Pressure must increase 0.25 ATM), so It have any suggestion about the simulationin to compare between Idea Gas ( Constant Volume) vs Simulation result ANSYS or CFX ????

ghorrocks · October 31, 2010, 18:15

CFX is accurate in modelling ideal gases. There is a problem in your simulation. Can you describe your test model and boundary conditions?

October 31, 2010, 10:49	Idea Gas calculation vs Simlation not same !!!!!	#1
P9408 New Member Thanathat Join Date: Mar 2009 Posts: 7 Rep Power: 17	My project I try to heat up the air to make a higher pressure in the reactor's cavity. After I do the simulation I found Pressure increased aound 0.001 ATM but from my calculation by P1/P2 = T1/T2 ( Constant Volume) I found the pressure will be 1.25 ATM ( It mean Pressure must increase 0.25 ATM), so It have any suggestion about the simulationin to compare between Idea Gas ( Constant Volume) vs Simulation result ANSYS or CFX ????

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October 31, 2010, 18:15		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,850 Rep Power: 144	CFX is accurate in modelling ideal gases. There is a problem in your simulation. Can you describe your test model and boundary conditions?