โ Scribed by P. Mishra; D. Singh; I.M. Mishra
No coin nor oath required. For personal study only.
This paper deals with the flow behaviour of Newtonian and non-Newtonian fluids flowing through packed and expanded beds. With the help of tube-bundle theory a generalized average shear-stress-shear-rate relationship is derived and found to predict the flow behaviour of power law as wel1 as non-power law fluids. Polyvinyl alcohol solutions in water, a representative of power law fluids, and grease in kerosene, a representative of nonpower law fluids, are studied. The present investigation covers the range of Reynolds number from lO_" to 10". An expression for average shear-stress at minimum fluidization velocity is derived and found to agree with that of our experiment. The generalized frictional Reynolds number is defined and a design chart is also presented for the evaluation of fluidizing velocities.
๐ SIMILAR VOLUMES
## Abstract The results of measurements of velocity distributions of Newtonian and nonโNewtonian fluids flowing through porous media are described in this contribution. The porous matrix was modeled by glass beads of different diameters forming a random bead packing confined by a circular tube. The
## Abstract Liquidโphase volumetric mass transfer coefficients, __k__~L~a were determined in threeโphase inverse fluidized beds of lowโdensity polyethylene (LDPE) and polypropylene (PP) spheres fluidized by a countercurrent flow of air and Newtonian (water and glycerol solutions) or nonโNewtonian l
A theoretical treatment IS presented which allows radml temperature and velocity profiles and the axial pressure profile to be pre&cted when VLSCOUS Newtoman and non-Newtonian flmds are heated or cooled m lammar flow m cucular tubes The overall heat transfer rate can also be pre&cted m the form of a