[adwaith.nath]

Hi,

I am trying to run a simulation for bare hull resistance for KCS using interFoam. I first ran a steady state simulation with LTS till the forces on the hull converged and then using this as the initial solution, I ran anunsteady simulation where the hull was allowed to move along the z direction and rotate about the y axis.

I was using rigidBodyMeshMotion library but I noticed that the trim was around 0.4 degrees which is incorrect.

When I use the sixDoFRigidBodyMesh library the trim is correct which is around 0.16 degrees.

Please note that all the other parameters are the same for both the cases . I have attached the both the dynamicMeshDict files along with this for reference.

When I say correct, it means I have experimental data, and simulations from both starccm and finemarine and all these show the same results which is 0.16 degree trim.

Is this a bug in the rigidBodyMeshMotion libarary or am I doing something incorrect. I checked the tutorial files DTCHullMoving and my setup is similar.

Thanks in advance.

dynamicMeshDicts.zip

sixDof_trim.png

rigidbody_trim.png