Motion of a cloud of particles under gravity and its sedimentation on a flat horizontal surface

Precipitation of a cloud of heated particles on a horizontal plane

“…A quantitative index of the precipitation process is the scattering coefficient m of the cloud on the precipitation plane, which is equal to the fraction of particles precipitated on the plane outside the initial projection of the cloud [4,5]. The changes in the scattering coefficient in the nonisothermal case are due to two effects affecting the movements of the carrier medium; the spread of the cloud and the onset of thermal convection.…”

“…In [4,5] the motion and precipitation of a cloud possessing plane symmetry (in a direction perpendicular to the action of the external force one of the dimensions of the cloud was much greater than the other) were examined.…”

“…This effect becomes more pronounced as the cloud approaches the precipitation plane owing to the spreading of the gas along it, which causes additional sideways transport of particles. This leads to precipitation of some particles at great distances from the plane of symmetry, exceeding the initial radius of the cloud~ In [4,5] the precipitation process was Considered in the isothermal case, where the gas and particle temperatures are equal.…”