The conveying characteristics tell a designer what the minimum conveying velocity for the material is, whether there is an optimum velocity at which the material can be conveyed, and what pipeline diameter and air mover rating is required for a given material flow rate and conveying distance.
The capabilities of the different groups of bulk solids are considered in terms of air requirements, minimum conveying air velocities, and solids loading ratios achievable and hence their potential for conveying with regard to material flow rates and conveying distances possible.
As with dense phase conveying, the minimum conveying air velocity for a material is a critical design parameter; however, unlike dense phase conveying, there is no significant change in its value with solids loading ratio.
The Froude number based criterion is aimed to address the requirement of different conveying velocities for different pipe diameters.
Arterial resistivity index (RI) is defined as (maximum velocity – minimum velocity)/maximum velocity).
The TCD parameters used were: Maximum velocity (Vmax), minimum velocity (Vmin), time average mean velocity (tamV), and pulsatility index (PI).
Only small-bodied black-footed and Laysan albatrosses encountered average wind speeds that exceeded their minimum sink velocities.
The minimum pickup velocity (Upu) for pneumatic conveying is analogous to the minimum fluidization velocity (Umf) in fluidization systems in that both dictate the minimum gas velocity required and have important implications in gas solid flows.
Cerebral haemodynamic parameters will include maximum blood flow velocity (Vmax), minimum blood flow velocity (Vmin), mean blood flow velocity (Vmean), pulsatility index (PI) and vascular resistance index (RI).
One important parameter to consider when designing a conveying system is pickup velocity, the minimum fluid velocity required for particle entrainment.
