Fluid Permeability in Stratified Unconsolidated Particulate Bed

Preparation of Multi-particulate Drug Delivery Systems by Fluid Bed Pellet Coating

In comparison to tablets drug loaded pellets exhibit the advantageous properties of multiparticulate drug delivery systems. After administration homogeneous distribution in the gastrointestinal tract takes place, drug is released over a large area avoiding concentration peaks, and bioavailability is improved. Up to this time the number of market products with drug coated inert pellets manufactu...

Hydromagnetic Instability of Stratified Rivlin-Ericksen Fluid in Porous Medium in the Presence of Suspended Particles

The stability of stratified Rivlin-Ericksen fluid in porous medium in the presence of suspended particles and magnetic field has been investigated. Upon application of normal mode technique, the dispersion relation was obtained. The important results obtained in this paper include the instability of non-oscillatory modes and the stability of oscillatory modes. Also, it was found that the system...

Turbulent mixing in a stratified fluid

The strength of diapycnal mixing by small-scale motions in a stratified fluid is investigated through changes to the mean buoyancy profile. We study the mixing in laboratory experiments in which an initially linearly stratified fluid is stirred with a rake of vertical bars. The flow evolution Ž . depends on the Richardson number Ri , defined as the ratio of buoyancy forces to inertial forces. A...

Buoyancy Fluxes in a Stratified Fluid

Direct numerical simulations of the time evolution of homogeneous stably stratified shear flows have been performed for mean flow Richardson numbers in the range from 0.075 to 1.00 and for Prandtl numbers ranging from 0.1 to 2. The local or instantaneous results indicate that when the turbulent Froude number FrT = 1 the peak value of mixing efficiency is Rf ≈ 0.25, a result independent of the P...

Heat transport in a stratified twophase fluid