Free settling
- Free settling is the settling of the particle unaffected by other particles and the wall of the container.
- In this process, the individual particle does not collide with the other
particles or with the wall of the container.
- Hence the particles are at sufficient distance from the wall of the
container & from each other.
- When the concentration of the solid particles in suspension is less than 1%
wt, free settling conditions exist
Hindered settling
- Hindered settling is the settling of particles affected by other particles
and by the walls of the container.
- In this process, the individual particle collides with the other particles
or with the wall of the container.
- Hence the particles should be close to each other and wall of the
container.
- When the concentration of the solid particles is large(> 1% by
wt.), the particles are so close to each other than the surrounding
particles will interfere with the motion of other particles and hindered
settling condition exists.
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