Velocity rescaling problem on rigid body

Please reply to the list, not to me.

The problem with velocity scale is that it knows nothing

about rigid bodies. If you just change the velocity of an atom

in a rigid body, it will not persist, b/c the rigid body constraints

will do their own thing. Instead you need to thermostat

the rigid body. Several of the fix rigid commands have options

for this, langevin or Nose/Hoover. They act on the

3 translational and 3 rotational DOF for the body itself.