finding the wetted surface of a floating body

ashkan · January 21, 2016, 22:03

Hi All,
I have a floating body in waves modelled in sixDoFRigidBodyMotion solver. I would like to calculate the excursion of the body with respect to free-surface at each time-step. This is different than the heave (vertical) displacement of the body.

I was wondering how this can be done in OpenFoam? Do I need to calculate it from the volume fraction value and how to do this at each time-step in sixDoFRigidBodyMotion solver.

I really appreciate any advice and help.

Regards
Ashkan

akidess · January 22, 2016, 02:15

I'm guessing the surface of the body is in a separate patch. Then patchIntegrate of the volume fraction (alpha) should do the trick?

ashkan · January 23, 2016, 21:25

Quote:

Originally Posted by akidess

I'm guessing the surface of the body is in a separate patch. Then patchIntegrate of the volume fraction (alpha) should do the trick?

Hi Anton,

Many thanks for your comment and suggestion. I looked into patchIntegrate solver in OpenFoam. It seems that I need to pass the mesh, alpha1 and my patch and it calculate the surface integral over that patch. Can you please explain a bit more on how this can be done in sixDoFRigidBodyMotionSolver?

If I understood this should return the submerged surface area and not the volume? How to calculate the submerged volume then?

Many thanks again
Ashkan

January 21, 2016, 22:03	finding the wetted surface of a floating body	#1
ashkan Member Join Date: Jul 2010 Posts: 55 Rep Power: 15	Hi All, I have a floating body in waves modelled in sixDoFRigidBodyMotion solver. I would like to calculate the excursion of the body with respect to free-surface at each time-step. This is different than the heave (vertical) displacement of the body. I was wondering how this can be done in OpenFoam? Do I need to calculate it from the volume fraction value and how to do this at each time-step in sixDoFRigidBodyMotion solver. I really appreciate any advice and help. Regards Ashkan

January 22, 2016, 02:15		#2
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	I'm guessing the surface of the body is in a separate patch. Then patchIntegrate of the volume fraction (alpha) should do the trick? __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

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