Sedimentation time

[kasse]

Is it possible to increase the sedimentation velocity of silica particles (2 um diameter )in water?

$$v = \frac{2}{9 \eta}R_s^2(\rho_{silica} - \rho_{water})g$$

 

[Borek]

Just looking at the equation I can think of at least three methods - two require adding something to water, third doesn't.

I think your question is a little bit too vague - are there any limitations to what we can/can not do?