10. Transport of particles
This chapter provides an introduction to the transport of particles that are either more dense (e.g. mineral sediment) or less dense (e.g. bubbles) than the fluid. A method of estimating the settling velocity of particles is explained, and then the loss of settling particles from a laminar flow and from a turbulent flow are contrasted. A simple scaling analysis tells us that if the settling velocity of the particles is much less than the friction velocity of the flow, then the turbulence will be sufficiently vigorous to keep the particles in suspension.
Sample problems require the user to gauge the settling (or rise) velocity of suspended particles and determine the effect that it has on downstream particle concentration.
(these links open in new browser windows)
