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02000CH206052001

What are the different mixing flow patterns an agitator creates in a vessel? Explain
with neat diagrams.

Show by dimensional analysis that power required by mixer impeller can be
correlated by means of power number as a function of Reynolds number and
Froude number.

The rheological properties of a china clay suspension can be approximated by
either a power law or Bingham plastic model over the shear rate range 10 -100 ‏ا8‎
‎If the yield stress is 15 Pa and the plastic viscosity (Ug) is 150 mPas, what will be
the value of power law consistency coefficient and flow behaviour index.

Scraper blades set to rotate at 35 rpm are used for a pilot plant addition of liquid
ingredients into a body-wash product. What should the speed of the blades be in a
full-scale plant, if the pilot and the full-scale plants are geometrically similar in
design? Assume that scaleup is based on constant tip speed, diameter of the pilot
plant scraper blades is 0.6 m, and diameter of the full-scale plant scraper blades is 8
ft.

A biscuit dough is prepared by mixing flour and other ingredients along with tracer
material (2% mass). After 10 minutes of mixing 6 random samples are collected

and their composition ( % of tracer material) is given below:

Calculate the mixing index after 10 minutes of mixing.

Explain, with neat sketch, the working of the following

(i) Change can mixers (ii) Internal mixers

List any two applications of each.

Explain, with neat sketch, the working of any two types of mixing equipment used

for the non cohesive solids. List any two application of each.

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