Free-falling diameter

Free-falling diameter Also known as sedimentation or Stokes diameter, the diameter of a sphere with the same terminal settling velocity and density as a nonspherical or irregular particle. 

Settling Stokes s diameter Drag diameter Free-fall diameter... 

At a low Re3uiolds number, the drag diameter equals the surface diameter of convex particles. For this case, the Stokes diameter, defined as the free-fall diameter in the laminar flow region, is related to sphericity as follows ... 

T] = 0.00125 Pa s. Alternatively, for comparison purposes, a size frequency distribution may be plotted or tabulated against free-falling diameter. 

A photosedimentometer has also been described for measuring free-falling diameters up to 20 cm in size with an application using coke. The system has been used to accurately measure a range of materials [31 ]. 

If the powder is initially concentrated in a thin layer floating on the top of a suspending fluid, the size distribution may be determined by plotting the fractional weight settled against the free falling diameter. 

Cumulative Methods. In cumulative methods the settling rate of suspensions or free-falling diameter are monitored. Cumulative methods have an advantage over incremental methods in that the amount of sample required is small (about 0.5 g), which reduces interaction between... 

Stokes Diameter The free-falling diameter of a particle in a fluid with laminar flow... 

Free-falling diameter Diameter of a sphere having the same density and the same free-falling speed as the particle in a fluid of the same density and viscosity. 

Xs Free-falling diameter Free-falling speed in the same liquid at the same particle density... 

Equivalent Particle Diameter or Equivalent Free-falling Diameter. A... 

The Stokes diameter, d, is the free-falling diameter of the particle in the Stokes law region and can be calculated from... 

The free-falling diameter, d, is the diameter of a sphere having the same density and the same free-falling velocity (or terminal velocity) as the particle in a fluid of same density and viscosity. In the Stokes law region, the free-falling diameter is the Stokes diameter defined earlier. 

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