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Old   July 21, 2009, 02:07
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meitham
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Hello
I am a student and the subject of my thesis is the modeling of the motion of a pandullum in water using ansys CFX. I want to solve this problem using moving mesh, but I don't wich king of boundary coundition should be chonsen for the upper side of box containing water. I used opening boundary coundition but by accelarating of pandullum in water all water got accelarated spilled out of box. please help me.
regards.
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Old   July 21, 2009, 18:49
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Glenn Horrocks
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Hi,

If the pendulum only swings through an arc you can model this more easily with a rotating frame of reference. You will have the generate the equation of motion of the pendulum and link it to the RFR rotational velocity as a CEL expression.

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