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Schematic representation of forces acting on particle dispersion under a critical surface. The hatched area represents the diffusional contamination probability.
Contamination scenarios including diffusion and inertia for different stopping distances and diffusional displacements , i.e., different diffusivities.
Contamination probability as function of particle diameter in quiescent air for initial particle velocities between 0.01 and and temperature gradients of for three different initial distances: (a) , (b) , and (c) ; pressure is , particle density is , and ambient temperature is .
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