Learning Forum

[CQU wwd]

Why does the solid domain wall and the fluid domain wall not bounce after contact when using dynamic or overset grid calculations?For example, simulate a ball falling into the well, in the sinking process because of 6dof swaying left and right, hit the boundary of the well, will not bounce, but continue to calculate, and then the ball will go out through the wall to the outside of the computing domain. After that, I found that there was a contact detection option in the dynamic grid, which seemed to use UDF, and after reading the fluent help documentation, I did not find relevant guidance, most of the time about DPM or DEM.

[Federico Alzamora Previtali]

The 6DOF model will compute external loads such as aerodynamic and gravitational forces and/or moments, but will not model contact forces. However, as you have said, you could model this for a rigid body by using a UDF for the contact.

You will need the following Macros:

SDOF_Get_Motion

SDOF_Overwrite_Motion

Please look at example 2.6.7.3 in Fluent's Customization manual 2.6.7 Define Contact (ansys.com)

[CQU wwd]

Thank you,you've help me a lot,I will try it.