Micromixing ??

Micromixing is effective homogenizing at the level of very small volume elements. Micromixing cannot be maintained as the scale increases.

 Would the presence in a reactor of inert insoluble solid particles knocking about in what is otherwise a solution improve mixing at high rotor speeds? If I try to imagine what is happening on the molecular scale I think it might enhance the mixing. Imagine someone in the middle of a large field with a baseball bat. This batter with the bat represents the stirrer and he has a bucket of balls, which he bats out towards all corners of the field. In the case representing a homogeneous solution it is as if he is batting out balls made of weakly compressed sand. When the bat hits each ball, the ball shatters into millions of small pieces that fly off in all directions, but none go very far. Thus there is very little effect much distance away from the vicinity of the batter’s swing. On the other hand, when the bat hits a real baseball, substantial energy is translated to the ball and it may fly to even the most distant part of the field. This is the case of the homogeneous solution containing inert insoluble particles; the momentum is better conserved in the case of the baseball. 

In the same way a solution containing insoluble macroscopic solid particles might stir remote parts of a reaction tank by driving these particles to the edges of the tank and these particles as they pass through the solution would create a local agitation.

Perhaps this is a completely useless analogy.