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November 30, 2015, 08:27 |
axis of rotation for gen6DoF option
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#1 |
New Member
Join Date: Jul 2015
Posts: 12
Rep Power: 10 |
Hi,
I apologize for another separate post on gen6DoF, since i couldn't get any replies i've made this thread. Could anyone tell me about the default axis of rotational oscillation in gen6DoF application? Is it the CofG (Center of gravity) or the axis can be some arbitrary point outside the body. I'm working on liquid sloshing in a tank and interested to give rotation of tank about some arbitrary point. What could be done if i want to change the axis of rotation of a tank? Thanking you |
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November 30, 2015, 17:45 |
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#2 |
Senior Member
Wouter van der Meer
Join Date: May 2009
Location: Elahuizen, Netherlands
Posts: 203
Rep Power: 17 |
Hello hydraulist,
I think the answer is in ...../OpenFOAM/OpenFOAM-3.0.x/src/sixDoFRigidBodyMotion/sixDoFRigidBodyMotion where it says that the momentum is calculated based on the axis Code:
// Moments are returned in global axes, transforming to // body local to add to torque. tau() += Q().T() & (rM + ((rP - centreOfRotation()) ^ rF)); Wouter |
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December 5, 2015, 01:36 |
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#3 |
New Member
Join Date: Jul 2015
Posts: 12
Rep Power: 10 |
Hello Wouter,
Thank you for the reply. I'l try to understand and use that. |
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