Where, ηvis and ηpot are the viscous and potential flow
efficiencies described by the theoretical curve of
Langmuir’s approximation shown in Figure-3. The
impaction efficiencies for the 1μm, 5μm and 10μm
particle sizes were calculated using (16) by first
calculating the Reynolds number for the different droplet
sizes and then predicting the potential and viscous
efficiencies using the theoretical curve in Figure-3.