J. Aerosol Sci. 81 (2015), pp. 34–46.

The effect of mixing rates on the formation and growth of condensation aerosols in a model stagnation flow

A Alshaarawi and F Bisetti. "The effect of mixing rates on the formation and growth of condensation aerosols in a model stagnation flow". J. Aerosol Sci. 81 (2015), pp. 34–46.​​

A Alshaarawi, F Bisetti
stagnation flow, condensation, polydispersity index, homogeneous nucleation, dibutyl phthalate, quadrature method of moments
2015
​A steady, laminar stagnation flow configuration is adopted to investigate numerically the interaction between condensing aerosol particles and gas-phase transport across a canonical mixing layer. The mixing rates are varied by adjusting the velocity and length scales of the stagnation flow parametrically. The effect of mixing rates on particle concentration, polydispersity, and mean droplet diameter is explored and discussed. This numerical study reveals a complex response of the aerosol to varying flow times. Depending on the flow time, the variation of the particle concentration in response to varying mixing rates falls into one of two regimes. It is shown that vapor scavenging by the aerosol phase is key to explaining the transition between these regimes. The results reported here are general and illustrate genuine features of the evolution of aerosols forming by condensation of supersaturated vapor from heat and mass transport across mixing layers.