[Soft-matter] Soft Matter & Stat Phys seminar 15 Oct 2021

[Maciej Lisicki]

Dear Soft Matter Colleagues and Friends,

On Friday 15 October 2021 at 9:30 AM at the UW Faculty of Physics (Pasteura 5, Warsaw; room 1.40) we are hosting a seminar during which

Daniel Albuquerque (IGF UW)

will give a talk

Liquid-ice mass partitioning in an idealized mixed-phase cloud parcel

Abstract
Several micro-physical processes determine phase partitioning between ice and liquid water in a mixed-phase cloud. Here we investigate the collective growth of ice particles and liquid droplets affected by turbulent fluctuations in temperature and water vapor fields. All cloud particles, including inactivated nuclei (both CCN and IN), are described by Lagrangian super-particles. To account for local variability in the turbulent cloud environment we apply a Lagrangian micro-physical scheme, where temperature and vapor mixing ratio are stochastic attributes attached to each super-particle. In addition, a simple linear relaxation scheme models turbulent mixing of the scalar fields probed by each super-particle. The limit of a locally homogeneous supersaturation field corresponds to an infinitely short turbulent mixing timescale. The impact of our Lagrangian micro-physical scheme on phase partitioning is tested in adiabatic cloud parcel simulations. Results are confronted with idealized reference simulations that use bulk micro-physics based on an assumed (temperature-dependent) phase partitioning function. Our study suggests that accounting for local variability in a turbulent cloud is important for reproducing steady-state mixed-phase conditions.

Everyone is welcome to attend the talk and the Soft Matter Coffee Break after the seminar, held in room 4.51 (4th floor).

Maria Ekiel-Jeżewska
Maciej Lisicki
Piotr Szymczak



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://tempulin.fuw.edu.pl/pipermail/soft-matter/attachments/20211013/a01408f2/attachment.html>