If a cup of water & dirt were mixed in a circular motion, would the dirt stay in the center of the cup?

I need an answer to this for school. Let's say you had a cup of water that had some dirt in it. If you used, say, a stick to rotate the water in a circular motion,spiral motion, would the dirt eventually clump toward the center of the cup?



I have a feeling it's like that because in a motion like the one I described, there'd be more energy and movement toward the outside of the cup than in the inside. However, I need scientific proof of this. An article, or something that proves that my thoughts are true or false.



Keep in mind: there's a small percentage of dirt in the water. About, 1/10 dirt.If a cup of water %26amp; dirt were mixed in a circular motion, would the dirt stay in the center of the cup?The dense(r than h2o) stuff would go to the center. Dirt is mostly dense.