The theory of capillary action

With a low center of mass,the wheel just swings back and forth like a pendulum,then stops.What about a different approach?In the 17th century, Robert Boyle came up with an idea for a self-watering pot.He theorized that capillary action,the attraction between liquids and surfaces that pulls water through thin tubes,might keep the water cycling around the bowl.But if the capillary action is strong enough to overcome gravity and draw the water up,it would also prevent it from falling back into the bowl.