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huge values of velocity and force for hydrofoil

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Old   March 7, 2022, 10:48
Default huge values of velocity and force for hydrofoil
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mohammad
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Hi
I'm trying to simulate a floating hydrofoil in water by 6DOF solver in fluent (time transient). hydrofoil is NACA 0012 and chord length is 1m and span length is 1.5m. I insert the hydrofoil in the center of a cubic domain. Velocity inlet is 1m/s and gravity is -9.81 m/s2.
The hydrofoil mass is 216kg and I calculate moment of inertia. I set these properties in 6dof properties.
The velocity and force of hydrofoil increase every time step when the values are so huge fluent give "floating point exception" error.
When I change fluid from water to air it seems ok.
The force of the hydrofoil and mesh is shown below.
Thanks

[IMG][/IMG]
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