English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We investigate the aggregation kinetics of sedimenting particlestheoretically and numerically, using the advection-diffusion equation.Agglomeration, caused by both transport mechanisms (diffusion and advection),is important for small particles, like primary ash or soot particles inatmosphere, and large particles of equal or close size, where the advectionmechanism is weak. For small Peclet numbers, which quantify the relativeimportance of diffusion and advection, we obtain the aggregation rates, as anexpansion in Peclet numbers. For large Peclet numbers we use purely ballisticaggregation rates. Combining these results we obtain the rational approximantfor the whole range of Peclet numbers. We also compute the aggregation rates bynumerically solving the advection-diffusion equation. The results of thenumerical simulations are in excellent agreement with the analytical theory forthe studied Peclet numbers, varying by four orders of magnitude.

Aggregation kinetics at sedimentation: the impact of particles diffusion