2. Correct density to be used in fluidisation calculations 4. Opposes the motion between the particle and the fluid media 5. A general equation that can be used to describe solid particles' movement in packed bed region 9. An excellent advantage of a fluidized bed 10. It is required in order to be able to compute the fluidized bed height 12. A fluidized bed is very commonly used in this industry 14. Region just the bed surface in which coarse particles fall back down 16. An emerging new fluidisation process 17. A type of force that acts on a particle 19. In this region, terminal velocity is directly proportional to the square root of the particle diameter 1. An advantage that a fluidized bed has for best chemical reaction 3. A physical process which uses a fluidized bed 6. Is needed to aid movement of a particle in a fluid medium 7. Shows the relationship between drag coefficient and the spheres Reynolds number 8. A sudden increase in gas flow rate in a bed causes this 9. Non-bubbling fluidization is also known as 11. Increase in bed voidage with fluidizing velocity is referred to as 13. "Father" of the classification of powders 15. One of the four regions that can be identified for a motion of a sphere in a fluid 18. An example of a typical coarse solid found in one of the four (4) powder classifications