Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Gradient-driven fluctuations experiment: fluid fluctuations in microgravity

Not Accessible

Your library or personal account may give you access

Abstract

We describe an experimental breadboard developed for the investigation of nonequilibrium fluctuations induced by macroscopic temperature and concentration gradients under microgravity conditions. Under these conditions the amplitude of the fluctuations diverges strongly for long wavelengths. The setup was developed at the University of Milan and at the University of California at Santa Barbara within the gradient-driven fluctuations experiment (GRADFLEX) project of the European Space Agency, in collaboration with the National Aeronautics and Space Administration. The apparatus uses a quantitative shadowgraph technique for characterization of the static power spectrum of the fluctuations S(q) and the measurement of their dynamics. We present preliminary experimental results for S(q) obtained in the presence of gravity for gradient-driven fluctuations for two cases, those induced in a liquid mixture with a concentration gradient produced by the Soret effect and those induced in a single-component fluid by a temperature gradient.

© 2006 Optical Society of America

Full Article  |  PDF Article
More Like This
Use of dynamic schlieren interferometry to study fluctuations during free diffusion

Fabrizio Croccolo, Doriano Brogioli, Alberto Vailati, Marzio Giglio, and David S. Cannell
Appl. Opt. 45(10) 2166-2173 (2006)

Photon correlation and scattering: introduction to the feature issue

William V. Meyer, Anthony E. Smart, Gerard H. Wegdam, Robert G. W. Brown, and Aristide Dogariu
Appl. Opt. 45(10) 2149-2154 (2006)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (8)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved