Interface troubles

Samu · December 7, 2009, 09:12

Hello,
I'm trying to modeling a rotating machine. So I've to use an fluid fluid interface for the rotor stator connection, I'm using a GGI connection.
But I've got somme troubles when I'm looking at the vorticity. As you can see on the image, the vorticity is not well transmit at the interface.

Have you already seen this problem ?

vorticity_pb.jpg

ghorrocks · December 7, 2009, 18:14

Vorticity is not "transmitted" at the interface. mass, momentum and energy is. The vorticity is calculated from the velocity field and I suspect the vorticity calculation is not exact adjacent to the boundary.

If you look at the pressure, velocity or temperature fields they should be continuous as they are "transmitted" at GGIs.

Samu · December 8, 2009, 03:38

Ok
thanks a lot, I have look for the velocity and the pressure flieds and the continuity is good at the interface.

December 7, 2009, 09:12	Interface troubles	#1
Samu New Member Join Date: Dec 2009 Posts: 2 Rep Power: 0	Hello, I'm trying to modeling a rotating machine. So I've to use an fluid fluid interface for the rotor stator connection, I'm using a GGI connection. But I've got somme troubles when I'm looking at the vorticity. As you can see on the image, the vorticity is not well transmit at the interface. Have you already seen this problem ? vorticity_pb.jpg Last edited by Samu; December 7, 2009 at 11:41.

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December 7, 2009, 18:14		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Vorticity is not "transmitted" at the interface. mass, momentum and energy is. The vorticity is calculated from the velocity field and I suspect the vorticity calculation is not exact adjacent to the boundary. If you look at the pressure, velocity or temperature fields they should be continuous as they are "transmitted" at GGIs.

December 8, 2009, 03:38		#3
Samu New Member Join Date: Dec 2009 Posts: 2 Rep Power: 0	Ok thanks a lot, I have look for the velocity and the pressure flieds and the continuity is good at the interface.