ISSN Online: 2377-424X
International Heat Transfer Conference 12
Behaviour of droplet clouds in thermal diffusion chamber under large temperature differences
摘要
A thermal diffusion cloud chamber under the non-Boussinesq approximation is considered. Trajectories and
growth of droplets generated by the homogeneous condensation of vapour phase diluted in a background gas is
studied numerically. The shift of droplets due to thermodiffusiophoresis as obtained from numerical predictions is compared with experimental data. The influence of forces acting on droplets in the conductive regime is shown. Then the buoyancy-induced convective motion under large temperature differences is taken into account
through a 2D modelling of thermal diffusion cloud chamber. Drop trajectories are not linear any more but are
rolled up while moving away from the centre of the cell.