Conférences - Thermodynamique, dynamique des fluides et physique statistique - Suède

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1
Particle growth in turbulence
18 mai 2020 - 12 jui 2020 • Stockholm, Suède
Organisateur:
Nordita - Nordic Institute for Theoretical Physics
Résumé:
The question of how particles and droplets can grow in a turbulent environment is of great current interest in many fields, in astrophysics, cloud microphysics, in biology, and in the engineering sciences. For example, coagulation and condensation in turbulent clouds turn microscopic cloud droplets into rain drops. In astrophysics, planetesimals are thought to form by aggregation of microscopic dust grains in the turbulent environment surrounding a forming star. In both cases, turbulence is believed to be a crucial factor for particle growth. Yet the microscopic mechanisms determining this growth are far from understood. In the past few years there has been substantial progress in understanding the mechanisms that determine how particles move in turbulence, albeit mostly for simplified model systems. The challenge is now to understand how these mechanisms lead to rapid particle growth.
Identifiant de l'évènement:
1230807
2
Are there Universal Laws in Non-Equilibrium Statistical Physics?
18 sep 2020 • Stockholm, Suède
Organisateur:
Nordic Institute for Theoretical Physics (Nordita)
Résumé:
Equilibrium statistical physics provides an extremely powerful, universal formalism that tells us how many-particle systems in thermal equilibrium behave, and how we can characterize their properties by only a few macroscopic quantities. However, most systems and processes found in nature are out of equilibrium. Think of any living organism, or directed transport in cells mediated by molecular motors. Often these systems consist of only a few entities and are so small that thermal fluctuations play a prominent role. It has been a vision from the early days of statistical mechanics to develop a theoretical description for such small non-equilibrium systems that is comparably powerful and universal as is equilibrium statistical physics. The aim of this program is to bring together the leading experts in (non-equilibrium) statistical physics to critically discuss and evaluate the latest developments towards a universal theory for non-equilibrium systems.
Identifiant de l'évènement:
1276817
Sujets apparentés:


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Dernière mise à jour: 27 Septembre 2019