Giant Fluctuations Induced by Thermal Diffusion in Complex Liquids - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Microgravity Science and Technology Année : 2020

Giant Fluctuations Induced by Thermal Diffusion in Complex Liquids

Alberto Vailati
  • Fonction : Auteur
  • PersonId : 1074743
Philipp Baaske
  • Fonction : Auteur
Serena Bolis
  • Fonction : Auteur
Marco Braibanti
  • Fonction : Auteur
Marina Carpineti
  • Fonction : Auteur
Roberto Cerbino
  • Fonction : Auteur
Jean-Luc Dewandel
  • Fonction : Auteur
Aleksandar Donev
  • Fonction : Auteur
Loreto García-Fernández
  • Fonction : Auteur
Fabio Giavazzi
  • Fonction : Auteur
Robert Haslinger
  • Fonction : Auteur
Steven Hens
  • Fonction : Auteur
Maria Knauer
  • Fonction : Auteur
Werner Köhler
  • Fonction : Auteur
Ewald Kufner
  • Fonction : Auteur
José M Ortiz de Zárate
  • Fonction : Auteur
Jeroen Peeters
  • Fonction : Auteur
Christian J Schwarz
  • Fonction : Auteur
Inese Silkina
  • Fonction : Auteur
Shenghua Xu
  • Fonction : Auteur
Daniel Zapf
  • Fonction : Auteur

Résumé

The GRADFLEX experiment of ESA has shown that under microgravity conditions a stationary thermodiffusion process is accompanied by giant non-equilibrium fluctuations with size as large as the size of the sample. In the presence of small concentration gradients, the features of the non-equilibrium fluctuations can be described by means of linearized hydrodynamics. However, the linear models are not suitable to describe most cases of applicative interest, such as fluctuations induced by large gradients and under non-stationary conditions. Moreover, presently the investigation of non-equilibrium fluctuations has mainly involved single component fluids and binary mixtures, but recently transport processes in ternary mixtures have attracted increasing interest due to the experiments performed on the International Space Station in the framework of the DCMIX project of ESA. The Giant Fluctuations (NEUF-DIX) project of ESA will investigate non-equilibrium fluctuations during diffusive processes occurring in complex multi-component mixtures, where one of the components is a macromolecule, such as a polymer, a colloid or a protein. Important objectives will be the exploration of the features of the fluctuations under non-ideal conditions, such as large gradients, transient processes, and concentrated samples, and the understanding of how the fluctuations affect the interactions between macromolecules. The project involves the development of a dedicated facility, consisting of an array of shadowgraph optical instruments working in parallel, each one equipped with a thermal gradient cell. Here we outline the design concept of the facility and the results of performance tests performed on a breadboard to evaluate the suitability of the designed instrument to carry out scientific measurements of non-equilibrium concentration fluctuations in space.
Fichier principal
Vignette du fichier
MST_XXX_2020_Giant_Fluctuations_02.pdf (1.6 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02899474 , version 1 (15-07-2020)

Identifiants

Citer

Alberto Vailati, Philipp Baaske, Henri Bataller, Serena Bolis, Marco Braibanti, et al.. Giant Fluctuations Induced by Thermal Diffusion in Complex Liquids. Microgravity Science and Technology, 2020, ⟨10.1007/s12217-020-09815-x⟩. ⟨hal-02899474⟩
734 Consultations
45 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More