# [GAMBIT] Water Slosing in Water Tank

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 October 11, 2013, 20:46 Water Slosing in Water Tank #1 New Member   iwan kurniawan Join Date: Jun 2013 Posts: 7 Rep Power: 5 Dear All, I have project for my thesis. I'm trying to run simulation for water sloshing in water tank. But i'm not sure when i mesh model in Gambit. Step by step in Gambit: 1. Create Tank Geometry 2. Create Face 3. Create Mesh EdgesType : Succesive Ratio Ratio : 1 Spacing :40 4. Create Mesh Faces Scheme :Apply Elements :Quad Type :Map Smoother:None Interval size : 1 5. Examine Mesh Display Type:Range 2D Element Quality Type:EquiAngle Skew I got the worst element quality value 0,89254 6. Specify Boundary Types all edges of tank are WALL 7. Specifiy Continuum Types need i set this step?please give me advise 8. Export Mesh Can anyone give me correction for the steps?I really need help for my thesis. Many Thanks all

 October 12, 2013, 06:10 #2 Senior Member     Daniele Join Date: Oct 2010 Location: Italy Posts: 992 Rep Power: 16 There is lack of data: is your simulation 2d or 3d? What are your specific problems? If your question is related to continuum type, if you use vof, I would set 2 different continuum types (i.e. create 2 faces (if 2d) or 2 volumes (if 3d)), water and air: this will help you when you have to initialize the solution in fluent. Daniele

October 12, 2013, 19:33
#3
New Member

iwan kurniawan
Join Date: Jun 2013
Posts: 7
Rep Power: 5
Quote:
 Originally Posted by ghost82 There is lack of data: is your simulation 2d or 3d? What are your specific problems? If your question is related to continuum type, if you use vof, I would set 2 different continuum types (i.e. create 2 faces (if 2d) or 2 volumes (if 3d)), water and air: this will help you when you have to initialize the solution in fluent. Daniele
Hi Daniele,
My thesis is 2D Simulation.First,I will make simulation for lateral sloshing force and moment in tank "without baffle" with 30%,50%,70% and 90% fill level of water in tank.Then,I will make sloshing simulation with different baffle design (horizontal,vertical,diagonal,horizontal-vertical) in tank with 30%,50%,70% and 90% fill level of water in tank. Finally, i get force and moment sloshing in tank for without baffle tank and tank with different baffle,I make comparison between sloshing in without baffle tank and with baffle tank and i know the best baffle design and effect of baffle on damping lateral fluid sloshing.

I will use VOF for my simulation.
for example,
for tank with 70% fill level of water, i will create stright edge on 70% tank height, then create face, bottom face for water and top face for air.Correct?

Many thanks Daniele

 October 13, 2013, 03:40 #4 Senior Member     Daniele Join Date: Oct 2010 Location: Italy Posts: 992 Rep Power: 16 Yes correct, however this is not necessary, as you can mark region (square) directly in fluent and patch that region after initializing. For continuum type: if you split your domain into 2 regions, set 2 continuum types (water and air), if you don't split it, set a single continuum type (ex: water) and you will split the domain after in fluent as I wrote before. Daniele

October 17, 2013, 18:25
#5
New Member

iwan kurniawan
Join Date: Jun 2013
Posts: 7
Rep Power: 5
Quote:
 Originally Posted by ghost82 Yes correct, however this is not necessary, as you can mark region (square) directly in fluent and patch that region after initializing. For continuum type: if you split your domain into 2 regions, set 2 continuum types (water and air), if you don't split it, set a single continuum type (ex: water) and you will split the domain after in fluent as I wrote before. Daniele
Okey Daniele,
I think more effective spilt in Fluent,because i will use mesh file for different fill level in tank.
Many thanks Daniele,i will try to set continuum type,then we will discuss again

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