# DynamicMesh

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 November 26, 2014, 06:36 DynamicMesh #1 New Member   Cna Join Date: Oct 2014 Posts: 4 Rep Power: 11 hi foamers ! for my master thesis I want to simulate a 2D cylinder that can rotate about one axis and translate in 2 direction, this motion couse by fluid motion in other word the motion isnt known before simulation,for this I use pimpleDyMFoam in of 2.3! but becaue of large deformation of mesh the motion of cylinder cannot bacome complete and after some iteration the solution diverge I think I must utilize some feature such as add/remove layer in my case but my ploblem is when I set my case I use sixDoFRigidBodyMotionCoeffs in my dynamicMeshDict and as I know this mesh solver is fixed topology. *** can any body help me to know how I can use mesh refinement (add/remove layer) in sixdofrigidbodymotion mesh solver? thanks

November 27, 2014, 03:34
#2
Senior Member

Join Date: Jun 2011
Posts: 163
Rep Power: 15
Quote:
 Originally Posted by sina769 hi foamers ! for my master thesis I want to simulate a 2D cylinder that can rotate about one axis and translate in 2 direction, this motion couse by fluid motion in other word the motion isnt known before simulation,for this I use pimpleDyMFoam in of 2.3! but becaue of large deformation of mesh the motion of cylinder cannot bacome complete and after some iteration the solution diverge I think I must utilize some feature such as add/remove layer in my case but my ploblem is when I set my case I use sixDoFRigidBodyMotionCoeffs in my dynamicMeshDict and as I know this mesh solver is fixed topology. *** can any body help me to know how I can use mesh refinement (add/remove layer) in sixdofrigidbodymotion mesh solver? thanks
your explanations are not sufficient. your cylinder can rotate about z axis and translate in x and y directions ? is there any resistant force in x direction which oppose to cylinder motion ? if not your cylinder tend to permanent motion in x direction and this is not a physical or good numerical problem

 Tags add layers, dynamicmeshdict, pimpledymfoam, sixdofrigidbodymotion