Acceleration fluid

Morris, K.R. Stowell, J.G. Byrn, S.R. etal., Accelerated fluid bed drying using NIR monitoring and phenomenological modeling Drug Dev. Ind. Pharm. 2000, 26, 985-988. 

Wildfong PLD, Sarny AS, Corfa J, Peck GE, Morris KR. Accelerated fluid bed drying using nir monitoring and phenomenological modeling method assessment and formulation suitability. J Pharm Sci 2002 9I(3) 631-9. 

Figure 7.16 Typical procedure used for the pressurized fluid extraction (or accelerated fluid extraction) of solids.

The entrance to the pipe acts as a nozzle, accelerating fluid that is originally at rest in the upstream vessel from a velocity C = 0 to a velocity cy. The entrance to the pipe is shown as a well-rounded, convergent nozzle, assumed frictionless, with the pipe... 

From physical analysis, it can be shown that the parabolic velocity profile results from a balance of the forces on the fluid in the pipe. The pressure gradient along the pipe accelerates fluid in the forward direction through the pipe, while at the same time, viscous shear stress retards the fluid motion. A parabolic profile is created by the balance of these effects. 

Small concentrations of enzymes can be used for the diffusive penetration of ocular tissues by electrophoresis and parabulbar injections. In such cases one can induce lysis of hemorrhages and exudates and restores the transparency of eye optical media. At the same time, small concentrations of enzymes can have an effect on metabolism in tissues and, in particular, on accelerating fluid metabolism and increasing the diffusion of drugs into ocular tissues. The latter point needs some further investigation. 

In similar line, for an accelerating fluid with acceleration, a the velocity lag between the particle fluid can be written as... 

---