How can I apply physics to Donut or Ring?

[goro]

In Vizard we have collide shapes for our physical objects
collideBox
collideSphere
collideCapsule
collideMesh
collidePlane

collideBox, collideSphere & collideCapsule can get affected by dynamic forces like gravity but collideMesh objects are unaffected by forces and can only provide a solid collision area for other objects. I want inner side of donut or ring too to have physical properties. Can you help me with the logic to get this thing done?