Hi Yongshen, How is your motion defined? Is it still a rigid body motion? The DeformingBodyMotion class uses the GridEvolution class to keep a time history of the moving grids that can be differenced in time to get the velocity and acceleration. Regards, Bill Yongsheng Lian wrote:
Hi, Did anyone have similar problem before? Overture uses MovingGrids.C to compute the velocity and acceleration of a moving rigid body. If the motion has a well-defined analytical function, the velocity and acceleration can be computed analytically and efficiently. However, if the motion is not regular, it becomes difficult to evaluate these variables. I recall someone posted before that we can still compute these using the deformingBodyGrids. I need some directions on how to implement it in the code. Any suggestion will be appreciated. Thanks, Yongsheng