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Coagulation of Particles Shear Flows The collision frequency function due to shear flow is given as
For |
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,
| (29) |
Turbulence
Saffman and Turner suggested that
| (30) |
where 
is the kinematic viscosity. For pipe flows (core region),
| (31) |
where R is the pipe radius. Average dissipation rate for the pipe is given as
| (32) |
Differential Motion by Gravitational Force
For particles falling according to Stokes settling velocity, the collision frequency function is given by
| (33) |
where 