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Old   July 16, 2008, 08:25
Default Water Waves in 2D
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MAB
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I have generated waves by perscribing velocities (u and v) on the inlet with initial conditions of zero velocities. it seems to work fine in 3D but when i try to run the same simulations on a 2D mesh it fails with an error (fatal overflow or sometimes not enough memory while there is enough memory) Any Suggestion please. Thanks
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Old   July 16, 2008, 22:17
Default Re: Water Waves in 2D
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Rogerio Fernandes Brito
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2D mesh??? at Fluent??
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Old   July 17, 2008, 01:52
Default Re: Water Waves in 2D
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Glenn Horrocks
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Hi,

I assume you have set up your 2D simulation as a mesh one element thick with symmetry planes on either sides.

Sounds like a setup problem. Check things are oscillating in the correct directions.

Glenn Horrocks
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Old   July 17, 2008, 05:38
Default Re: Water Waves in 2D
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MAB
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hi . yes it is extruded 2D mesh with one element think and symmetry planes at fron and back. the simulation works if i make initial values(of velocity) same as the boundary values at inlet. but i want to run it for a zero initial velocity. and it works in 3D
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Old   July 17, 2008, 05:52
Default Re: Water Waves in 2D
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MAB
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it is CFX. 2D extruded mesh. also i have place a line control(followed by a point controle) to refine the mesh at free surface. i think it is the mesh but how can i controle it
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Old   July 17, 2008, 12:11
Default Re: Water Waves in 2D
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MAB
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hi Glenn.H. the 2D simulation works in the absense of line spacing( which i have used to refine the mesh at free surface) ... any further suggestion please...?

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Old   July 17, 2008, 21:48
Default Re: Water Waves in 2D
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Glenn Horrocks
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Hi,

Are you sure you are using symmetry planes for the top and bottom faces? Is the thickness of your extrusion approximately equal to the smallest element length?

Glenn Horrocks
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Old   July 18, 2008, 04:29
Default Re: Water Waves in 2D
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MAB
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front and back is symmetry planes. while top is open boundary and bottom is a wall . left is inlet and right is outlet/opening...
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