A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below: Δ P/L = 375 × 103 VOM + 10.94 × 106 V2 OM (SI units) If water is to be used as the fluidising medium, in actual operation, the above bed has a height = 1 m. What is the porosity of the fluidised bed?

The general relationship between speed N, head H, power P and discharge Q for a centrifugal pump is________?

Reactions with high activation energy are________?

In Newton’s law of viscosity, which states that the shear stress is proportional to the ________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient)?

________ tower is the most suitable gas-liquid contacting device involving highly corrosive fluids?

The absorption factor is defined as (where, S1 = slope of the equilibrium curve, S2 = slope of the operating line)?