Waves again %-(

Ghirghidov · May 13, 2009, 06:26

Hi there.
From the beginning. I am using F3D 9.3.1. I tried to test wave tank from training course, user site example, and forum example. So the point is that water flows away and the volume of fluid decreases. It happens when wave with initial amplitude comes to right border.
Could anyone explain me what am I doing wrong.

H.C · May 14, 2009, 13:34

I assume you use the outflow boundary condition at the downstream and check the box for outflow boundary condition dialog. You may try using split lagrangian VOF method under the Numerics tab.

Ghirghidov · May 15, 2009, 04:10

Dear H.C.

You are absolutely right. I am using outflow BC with "allow fluid..." and water level and Split Lagrangian VOF.
Of course I can use long tank for modeling but this is bad decision.

May 13, 2009, 06:26	Waves again %-(	#1
Ghirghidov Member Armen A. Ghirghidov Join Date: Mar 2009 Posts: 50 Rep Power: 17	Hi there. From the beginning. I am using F3D 9.3.1. I tried to test wave tank from training course, user site example, and forum example. So the point is that water flows away and the volume of fluid decreases. It happens when wave with initial amplitude comes to right border. Could anyone explain me what am I doing wrong.

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May 14, 2009, 13:34		#2
H.C Member Join Date: Mar 2009 Posts: 40 Rep Power: 17	I assume you use the outflow boundary condition at the downstream and check the box for outflow boundary condition dialog. You may try using split lagrangian VOF method under the Numerics tab.

May 15, 2009, 04:10		#3
Ghirghidov Member Armen A. Ghirghidov Join Date: Mar 2009 Posts: 50 Rep Power: 17	Dear H.C. You are absolutely right. I am using outflow BC with "allow fluid..." and water level and Split Lagrangian VOF. Of course I can use long tank for modeling but this is bad decision.