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Aerosol Transport – Inertia


:: Section 8

Curvilinear Motion and Stokes Number

  Section Contents
I. Curvilinear Motion

When a particle follows a curved path, it is said to have curvilinear motion. An example of curvilinear motion is the trajectory of a particle injected horizontally with a velocity V0 into still air while influeneced by the gravity, as shown below:

The situation is more complicated for a flow around an obstacle. Very small particles with negligible inertia will follow the gas streamlines perfectly. Large particles will tend to continue in a straight line, regardless of what the gas flow does due to the inertia.