A CFD based approach to assess the effect of environmental parameters on decay product-aerosol attachment coefficient

Attachment of decay products of radon and thoron to environmental aerosols is an important process which govern the inhalation dose. This process is characterised by the attachment coefficient, that depends on size characteristics of aerosols and environmental parameters like temperature and extent of air turbulence. In the present work, CFD based simulations have been carried out to study the attachment behaviour of thoron decay product, 212 Pb, with mono-disperse as well as poly-disperse aerosols in an experimental chamber. The variations of attachment coefficient with temperature and turbulence have been studied. The simulation results have been compared with data reported in literature.