high air velocity at interface in interFoam

ufocfd · May 3, 2017, 16:25

I have noticed similar issues to a previous post about high air velocity at the air/water interface in interFoam. In the Figure below the water surface is static (for testing) but there is still a significant air velocity along the water surface and up the right hand side. Is there any way to stabilize/minimize the air flow (without using solver mods). It seems to be causing some ripples at the water surface.

https://drive.google.com/open?id=0B4...nRTMHRnWUFsN1E

phani45 · May 9, 2017, 11:53

Can you give further details like boundary conditions, description fo the problem. Then I can help you

tombo · November 1, 2017, 03:04

Did you figure this out?

lourencosm · May 6, 2019, 07:52

It seems to me an initialisation problem.
The cells faces may not be aligned with the initial interface level.
Some methods are available, namely the funkySetFields tool of swak4foam.
On the most complex cases I've also did a pre-initialisation of the water level using a very very high viscosity for the water, and then using the correct value after it's stabilised.

May 3, 2017, 16:25	high air velocity at interface in interFoam	#1
ufocfd Senior Member Giles Richardson Join Date: Jun 2012 Location: Cambs UK Posts: 102 Rep Power: 14	I have noticed similar issues to a previous post about high air velocity at the air/water interface in interFoam. In the Figure below the water surface is static (for testing) but there is still a significant air velocity along the water surface and up the right hand side. Is there any way to stabilize/minimize the air flow (without using solver mods). It seems to be causing some ripples at the water surface. https://drive.google.com/open?id=0B4...nRTMHRnWUFsN1E

May 9, 2017, 11:53	Please give further details	#2
phani45 Member Phanindra Join Date: Jan 2013 Posts: 39 Rep Power: 13	Can you give further details like boundary conditions, description fo the problem. Then I can help you

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November 1, 2017, 03:04		#3
tombo New Member Thomas Ewing Join Date: Jul 2015 Location: Melbourne Posts: 19 Rep Power: 11	Did you figure this out?

May 6, 2019, 07:52		#4
lourencosm Member Lourenço SM Join Date: Jul 2014 Location: Lisboa, Portugal Posts: 41 Rep Power: 12	It seems to me an initialisation problem. The cells faces may not be aligned with the initial interface level. Some methods are available, namely the funkySetFields tool of swak4foam. On the most complex cases I've also did a pre-initialisation of the water level using a very very high viscosity for the water, and then using the correct value after it's stabilised.