Dario Ortisi covers a way to get custom rotational velocities with Bifrost like the one in his tire burnout simulation.

You may have seen senior 3D Artist Dario Ortisi’s tire burnout simulation that used Bifrost and Aero to create smoke on an animated rotating tire. A crucial part of that effect is to get rotational velocities for the fast-rotating tire. Here, Ortisi dives into how to get those custom rotational velocities using Bifrost in Maya.

Dario created a custom Compound called Normal to Velocity that takes vertex_normal from an object and sets point_velocity after manipulating and rotating it, and explains how it works here.