Q4/ A vertical water softener column of 1.65 m diameter is packed to a height of 3.55 m with 9.5 ton ion- exchange resin 2.375 sp.gr cylindrical particles of 1.65 mm average diameter and 3.55 mm height. Calculate the void fraction (e) and the pressure drop of water flows over the fixed bed at a rate 220 m³/h? Could this water at 1 atm, across the bed due to gravity (i.e. without pump)? What the power of the pump (n =0.62) must be used in order to pump the water across the softener when it is flow downward (if it is required a pump) and when it is flow upward. For water p =1000 kg/m³ μ = 1 cP

Q4: Oil of density 900 Kg/m' and viscosity 3 m Ns/m', is passed vertically upward through a fluidized bed of catalyst consists packing of 0.5 cm cubes particles which density is 2600 kg/m³. The diameter and height of the column are 0,1 m and I m respectively. If the number of particles is 33,300 units calculate: a- The minimum fluidization velocity. b. The minimum diameter of 0.5 cm. Assume the voidage will not change. fluidization velocity if we use spherical particles with

Back HW#2 QUESTION1/60pts] A fluid of viscosity u flows in the horizontal cylinder (radius R) shown in the figure under a constant pressure gradient dP/dx. The inner core of the cylinder is filled with a porous material. The flow in this porous region is slow and assumed to be a plug-type flow such that the velocity is constant and everywhere the same inside the porous region. Denote this velocity by Uo. The flow in the open (non-porous) region is steady, Newtonian, incompressible and axisymmetric. It will be assumed that only the axial (x) component of the velocity is non-zero. Flow Open flow T&R Porous media flow R N.B. All your answers must be expressed in terms of µ, U₁, a, R and dP/dx. (a) Use the continuity and Navier-Stokes equations to determine the expression of the velocity in the open region. (b) What is the expression of the average velocity in the open region? (c) Is the assumption of a linear velocity profile in the open region acceptable when this region Tuatifi 1:

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