I imagine it would have to be some sort of impractically large closed-loop steam system, probably running around the perimeter of the pot, with a rotating paddle inside. Not at all practical, but it would be neat.
I imagine it would have to be some sort of impractically large closed-loop steam system, probably running around the perimeter of the pot, with a rotating paddle inside. Not at all practical, but it would be neat.
Stir plates use magnets and magnetic stirers, and can be used without heat
Made my own stir plate once with a computer fan, magnets, and a potentiometer. I am sure they come with heat if needed. They can come with extremely large stirring bars.