settling velocity

settling velocity

[′set·liŋ və‚läs·əd·ē]
(fluid mechanics)
The rate at which suspended solids subside and are deposited. Also known as fall velocity.
(mechanics)
The velocity reached by a particle as it falls through a fluid, dependent on its size and shape, and the difference between its specific gravity and that of the settling medium; used to sort particles by grain size.
References in periodicals archive ?
Among different grades of synthesized PAMs, PAM-[V.sub.3] exhibited highest settling velocity.
Equation 3 indicates the settling velocity (V) of a droplet with a density of [[rho].sub.w] and a radius of r, settling down in a bulk fuel with a viscosity of [mu] and a density of [[rho].sub.f], where g is the acceleration due to gravity.
After a juvenile drops off the fish host, the location where it comes to rest on the streambed should be determined by a combination of settling velocity of the juvenile, current velocity (Fig.
The settling velocity of sediment particles is one of the key variables in the study of sediment transport and is important in understanding suspension, deposition, mixing, and exchange processes.
in which ya is the thickness of the sheet-flow layer, Ca is the concentration at ya which equals the bed-load concentration, z*=[omega]/[kappa]u* is the suspension index, and [omega] is the particle settling velocity. The similar expression of PDFM also can be created by the method below based on the Schmidt diffusion equation (Schmidt, 1925).
In the laminar flow regime, where Reynolds number [7] is approximately less than 0.1, the settling velocity can be expressed by Stoke's law [8] in liquid Al during grain refinement that can be applied for the estimation of settling rate of metal droplets in the liquid slag [9].
To quantitatively study the particle motion, the time evolution of the vertical position (Y) and the settling velocity ([U.sub.y]) is shown in Figure 9 for Re = 10, 80, 100, and 200.
When the settling velocity [omega] increases from 0.01 to 0.04 (Figure 2), the concentration profiles of different models exhibit more nonuniform distribution features.
After entrainment, the movement of pollen within large airflow patterns is generally considered in terms of the terminal settling velocity of pollen grains (which depends on the density and the size of pollen grains) and on ambient meteorological conditions.
Droplet nuclei smaller than 5 [micro]m exhibit a settling velocity below 1 m/h in still air, and can therefore follow the person's exhalation flows and the ambient air flows.
The change in settling velocity of inertial particles in cellular flow was studied by Chan and Fung [13].