floating：how to set a constant velocity of a floating body

LLL · May 2022

Dear all，

I want to set a constant velocity of a floating body in x direction，which meanwhile moving downwards in z direction acting on external forces. I have met the problem:

It seems that the body can't move at constant velocity when I set the it as floatings. Because the "motion" function can't apply on "floationgs".

LLL · May 2022

Another Question: Can I use “restart” function to change parameters such as friction over time? For example， in 0-3s，the friction of the wall is 0, in 3-5s, the friction of the wall is 0.5.

Thanks in advance.

Alex · May 2022

What do you want to do? If you want to create a moving object, then just use the motion to specify it and there is no need to define it as floating body...

Regards

LLL · May 2022

https://forums.dual.sphysics.org/discussion/comment/5261#Comment_5261

Thanks. I want to create a floating body moving at constant velocity. Just like a boat floating on the ocean moving forwand at constant velocity.

Asalih3d · June 2022

This is possible. Look at:

DualSPHysics_v5.0\examples\others\MotionFloating\CaseMotionFloating_Def.xml

Consider not using a floating, if what you want is purely motion behaviour. But you can do what you want through floatings like shown in the xml.

Kind regards

LLL · June 2022

Thanks a lot @Asalih3d

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floating：how to set a constant velocity of a floating body

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