Terminal velocities

VELOCITY, TERMINAL - The highest sustained air stream velocity existing in the mixed air path at the end of the throw. 

The overall reaction rate requires knowledge of both the diffusion and surface reaction step. The diffusion step can be estimated from a slip velocity-terminal velocity theory but values for the surface reaction rate must be obtained by experiment and this may be difficult. Slip velocities can also be calculated from the terminal velocity-slip velocity theory and these may enable overall reaction rates in more easily defined hydrodynamic systems to be used to estimate the rates obtainable in a stirred vessel. For efficient suspension geometries,... 

Initial moisture content Moisture content of the product Minimum fluidizing gas velocity Operating gas velocity Terminal gas velocity... 

High viscosity of a sonicated liquid lowers the cavitation threshold markedly. Viscous liquids generate bubbles only at high sound pressures. Bubble motion is damped by the dissipative effect of the viscosity and the smaller maximum bubble radii, and the lower inward wall velocities terminate most sonochemical effects. 

Figure 6.7.7 Fluidization regimes with fine particles (a minimum fluidization velocity, b beginning of bubbling, c minimum discharging velocity (terminal velocity in free fall), and d blowout velocity. Adapted from Froment and Bischoff (1990) Squires, Kwauk, and Avidan (1985) and Avidan and Shinnar (1990).

Rising Velocity (Terminal Velocity) of Single Bubbles [83]... 

Calculate the settling velocity (terminal velocity) for the drops in each liquid phase. Simplify the results, assuming that drops behave like solid spherical particles in the Stokes regime. 

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