Editing Nebulizer (section)

==Aerosol deposition==
The lung deposition characteristics and efficacy of an aerosol depend largely on the particle or droplet size. Generally, the smaller the particle the greater its chance of peripheral penetration and retention. However, for very fine particles below 0.5&nbsp;μm in diameter there is a chance of avoiding deposition altogether and being exhaled. In 1966 the Task Group on Lung Dynamics, concerned mainly with the hazards of inhalation of environmental toxins, proposed a model for deposition of particles in the lung. This suggested that particles of more than 10&nbsp;μm in diameter are most likely to deposit in the mouth and throat, for those of 5–10&nbsp;μm diameter a transition from mouth to airway deposition occurs, and particles smaller than 5&nbsp;μm in diameter deposit more frequently in the lower airways and are appropriate for pharmaceutical aerosols.<ref>The science of nebulised drug delivery, p6</ref>
Nebulizing processes have been modeled using [[computational fluid dynamics]].<ref>{{cite journal|vauthors=Hailu N, Postema M, Krejcar O, Assefa D|title=Nebulization criteria and quantification|journal=Fluids|year=2020|volume=5|issue=2 |pages=91|doi=10.3390/fluids5020091
|bibcode=2020Fluid...5...91H |doi-access=free }}</ref>