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:



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