Boundary Conditions in Gambit for a dam break model

Lindsey · October 2, 2009, 09:48

Hi,
I created a mesh for a 3D dam break model. I plan on doing a VOF model with LES. I have two volumes; water and air. I am unsure of what to name the side where the vertical dam is ( the front of the water volume). Also the end of the flume is a free fall, what is the boundary condition for a free fall? I have decided to name the top of the water surface that meets the air volume as interface, should this be something different? Thank you for your time

Lindsey

-mAx- · October 5, 2009, 01:51

Regarding VOF, just set 2 separated fluid domains in Gambit (icon next to BC)
You don't need to set any fluid interface

Philipov · October 5, 2009, 02:53

Ensure you patch the water domain before calculation...

October 2, 2009, 09:48	Boundary Conditions in Gambit for a dam break model	#1
Lindsey New Member Lindsey Join Date: Oct 2009 Location: Columbia, SC Posts: 2 Rep Power: 0	Hi, I created a mesh for a 3D dam break model. I plan on doing a VOF model with LES. I have two volumes; water and air. I am unsure of what to name the side where the vertical dam is ( the front of the water volume). Also the end of the flume is a free fall, what is the boundary condition for a free fall? I have decided to name the top of the water surface that meets the air volume as interface, should this be something different? Thank you for your time Lindsey

October 5, 2009, 01:51		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	Regarding VOF, just set 2 separated fluid domains in Gambit (icon next to BC) You don't need to set any fluid interface __________________ In memory of my friend Hervé: CFD engineer & freerider

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October 5, 2009, 02:53		#3
Philipov Senior Member Svetlin Filipov Join Date: Mar 2009 Location: United Kingdom Posts: 176 Rep Power: 17	Ensure you patch the water domain before calculation...