Dependence on the initial conditions

MissCFD · November 18, 2019, 22:37

Hi,

I simulate a multiphase flow with continous phase for air and water. I would like to know if there may have a dependence on the initial conditions even if I run a steady state simulation ?

Thank you for your help it's appreciated

ghorrocks · November 19, 2019, 00:43

Yes, it is possible to have a dependance on initial conditions, even for a converged steady state run.

For example, imagine the Coanda effect in a diffuser with separation. The jet can stick to one side of the diffuser or the other and converge in steady state in either configuration. Which one it sticks to depends on the initial conditions.

November 18, 2019, 22:37	Dependence on the initial conditions	#1
MissCFD Senior Member Join Date: Aug 2014 Posts: 160 Rep Power: 11	Hi, I simulate a multiphase flow with continous phase for air and water. I would like to know if there may have a dependence on the initial conditions even if I run a steady state simulation ? Thank you for your help it's appreciated

November 19, 2019, 00:43		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Yes, it is possible to have a dependance on initial conditions, even for a converged steady state run. For example, imagine the Coanda effect in a diffuser with separation. The jet can stick to one side of the diffuser or the other and converge in steady state in either configuration. Which one it sticks to depends on the initial conditions. __________________ Note: I do not answer CFD questions by PM. CFD questions should be posted on the forum.

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