Compartmental modelling of stirred tank for flocculation requiring a minimum critical shear rate
✍ Scribed by P.T.L. Koh
- Book ID
- 103008633
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 511 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0009-2509
No coin nor oath required. For personal study only.
✦ Synopsis
In uniform shear flow, a minimum critical shear rate is known to be present during tlocculation of a partially destabilized suspension so that at shear rates below the critical value, the flocculation rate 1s zero. In a stirred tank withdistributed shear rates,it is possible for the shear rates in some parts ofthe tank to be below fhe critical value. In this paper the floccuIation kinetics are described by a compartmental model in which zones of low shear rate are treated as a separate compartment. The theoretical flocculation rate for a monosized suspension is obtained by numerical integration from the mean shear rate for the whole tank, or from the stirring speed in a given geometry.