homogenous/inhomogeneous model

antonio · February 9, 2011, 09:40

Hi all.

I am simulating a free-surface flow and using the homogeneous model (according to the documentation it says that free surfaces flow are a paradigmatic example of a homogeneous flow if the interface is well resolved). But let`s suppose that (like my case) the fluid has to go through an obstacle and tends to accelerate after that obstacle. Do you think that inhomogeneous model could be a good approach (also to have a better convergence)?

Regards

ghorrocks · February 9, 2011, 18:34

The choice between homogeneous and not has nothing to do with obstacles and accelerations. The choice is made as to whether a single velocity field will adequately capture both phases. Providing the interface remains clear homogeneous should be good. If the interface is unclear (eg foamy or bubbly flow) then consider inhomogeneous.

antonio · February 10, 2011, 13:34

Ok.Many thanks.
Regards

February 9, 2011, 09:40	homogenous/inhomogeneous model	#1
antonio Senior Member Join Date: Jan 2010 Posts: 110 Rep Power: 16	Hi all. I am simulating a free-surface flow and using the homogeneous model (according to the documentation it says that free surfaces flow are a paradigmatic example of a homogeneous flow if the interface is well resolved). But let`s suppose that (like my case) the fluid has to go through an obstacle and tends to accelerate after that obstacle. Do you think that inhomogeneous model could be a good approach (also to have a better convergence)? Regards

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February 9, 2011, 18:34		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	The choice between homogeneous and not has nothing to do with obstacles and accelerations. The choice is made as to whether a single velocity field will adequately capture both phases. Providing the interface remains clear homogeneous should be good. If the interface is unclear (eg foamy or bubbly flow) then consider inhomogeneous.

February 10, 2011, 13:34		#3
antonio Senior Member Join Date: Jan 2010 Posts: 110 Rep Power: 16	Ok.Many thanks. Regards