# Water level in a rotating tank problem

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 June 5, 2012, 01:30 Water level in a rotating tank problem #1 New Member   Krishna Sandeep Join Date: Jun 2012 Posts: 10 Rep Power: 5 Hi everyone I am completely new to openFOAM and am trying to workout the " water level in a rotating tank" problem. I should find out the new surface of water and the pressure distribution inside the water. Please direct me how to solve it...if anyone have already tried it please give me a link to the files so that i can run the case.

 June 5, 2012, 03:31 #2 Senior Member   lore Join Date: Mar 2010 Location: Italy Posts: 463 Rep Power: 9 Is the thank cylindrical and it's just rotating around its center?

 June 5, 2012, 06:33 #3 New Member   Krishna Sandeep Join Date: Jun 2012 Posts: 10 Rep Power: 5 yeah the tank is cylindrical and is rotating about its vertical axis.....i want to see the vortex formation i.e., the shape of the free water surface..

 June 5, 2012, 06:36 #4 Senior Member   lore Join Date: Mar 2010 Location: Italy Posts: 463 Rep Power: 9 Then you just need to set your cylinder as a rotating wall in your U file; Code: ``` "cylinder_.*" { type rotatingWallVelocity; origin (0 0 0); axis (0 0 1); omega constant 3000; }``` Krishna Sandeep likes this.

 June 6, 2012, 02:16 #5 Senior Member   cfdkid Join Date: Mar 2009 Posts: 133 Rep Power: 8 Hi Lore,Hello sandeep Is the tank going to be open or closed ? ( free surface model or regular internal flow or closed lid with two fluids (air,water)) __________________ ________________________________________ Regards, CFDkid It never gets easier You just get Better

 June 6, 2012, 02:46 #6 New Member   Krishna Sandeep Join Date: Jun 2012 Posts: 10 Rep Power: 5 The tank is closed. assume that the liquid is inviscid and free of surface tension. Water is filled up to half of the tank. What solver should i use? I've been doing the problem similar to that of dam-break case with different initial fields and viscosity and sigma as 0....is this correct?

 June 6, 2012, 02:47 #7 New Member   Krishna Sandeep Join Date: Jun 2012 Posts: 10 Rep Power: 5 The tank is closed. assume that the liquid is inviscid and free of surface tension. Water is filled up to half of the tank. What solver should i use? I've been doing the problem similar to that of dam-break case with different initial fields and viscosity and sigma as 0....is this correct? I ve given the rotating wall condition and can actully feel the wall rotating....

June 11, 2012, 09:20
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Edward Leonard
Join Date: May 2012
Location: Calumet, MI
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Quote:
 Originally Posted by Krishna Sandeep The tank is closed. assume that the liquid is inviscid and free of surface tension. Water is filled up to half of the tank. What solver should i use? I've been doing the problem similar to that of dam-break case with different initial fields and viscosity and sigma as 0....is this correct? I ve given the rotating wall condition and can actully feel the wall rotating....
I don't know how valid the inviscid approximation will work for this since the rotating boundary will be your entire driving force for the flow - if there's no viscosity near the boundary layer, then what reason would the fluid have to flow?

 November 15, 2014, 11:32 #9 New Member   Deutschland Join Date: May 2014 Posts: 12 Rep Power: 3 hi. sandeep, have you found the solution?

 Tags rotatingcylinder, waterlevel

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