Flow Past Immersed Bodies

Work In Pair (EKC 212) Chapter 7 (Part 2) : FLOW PAST IMMERSED BODIES Name/ Matric No: Name/ Matric No:

1. 3 spherical particles fall into water. Initially, the particles are in same position with same terminal velocity. What is the distance between them when all the particles achieve terminal velocity of 99%. Assume that Stoke law is valid for all cases.

Assume that Stoke law is valid for this case. 2. Estimate the terminal velocity for 0.06mm-0.1mm particles of limestone (ρs = 2450 kg/m3) falling in water at 30oC. Given : ρwater = 995.7 kg/m3; μwater = 0.801 x 10-3 kg/ms 3. Give 5 different types of fluidization processes. 4. How is the minimum fluidization can be achieved 5. Solid particles having a size of 0.14mm, a shape factor φS of 0.88, and a density of 900 kg/m3 are to be fluidized using air at 2.0 atm and 25oC. The voidage at minimum fluidizing (εmf) condition is 0.38. If the cross-section of the empty bed is 0.42 m2 and the bed contains 380 kg of solid, calculate the (i) Lmf, (ii) ΔPmf and (iii) Vmf. Given: μf = 1.845 x 10-5 Pa.s; ρf = 2.374 kg/m3; P = 2.02 x 105 Pa

15/9/2009