Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Concentration fluctuations in nonisothermal reaction-diffusion systems.

José M Ortiz de Zárate1, Jan V Sengers, Dick Bedeaux

  • 1Departamento de Física Aplicada I, Universidad Complutense, 28040 Madrid, Spain.

The Journal of Chemical Physics
|July 28, 2007
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

A Nanothermodynamic Approach to the Shuttleworth and Lippman Equations.

Entropy (Basel, Switzerland)·2026
Same author

Thermodiffusion and thermo-osmosis in thin membranes with slit pores.

The European physical journal. E, Soft matter·2026
Same author

From interface dynamics to Darcy scale description of multiphase flow in porous media.

Advances in colloid and interface science·2026
Same author

A model for maxilloturbinate morphogenesis in seals.

PloS one·2025
Same author

The effect of temperature constraints on the treatment of tumors using focused ultrasound-induced acoustic streaming.

Scientific reports·2025
Same author

On the Elimination of Fast Variables from the Langevin Equation.

Entropy (Basel, Switzerland)·2024

This study examines fluctuations in a chemically reacting fluid mixture under a temperature gradient. A temperature gradient enhances concentration fluctuations, offering a way to distinguish reaction control mechanisms.

Area of Science:

  • Physical Chemistry
  • Chemical Physics
  • Fluid Dynamics

Background:

  • Reaction-diffusion systems involve coupled chemical reactions and diffusion processes.
  • Fluctuations are inherent in systems at hydrodynamic scales.
  • Temperature gradients introduce nonequilibrium conditions.

Purpose of the Study:

  • To investigate concentration fluctuations in a binary fluid mixture with an association-dissociation reaction under a temperature gradient.
  • To compare these fluctuations with those in an isothermal system.
  • To explore the potential for distinguishing reaction control mechanisms via fluctuation analysis.

Main Methods:

  • Review of fluctuating hydrodynamics in global equilibrium.
  • Theoretical analysis of fluctuations in a temperature gradient.

Related Experiment Videos

  • Consideration of nonequilibrium molecular dynamics simulations.

    • Main Results:

    • A temperature gradient enhances the intensity of concentration fluctuations.
    • Nonequilibrium concentration fluctuations are spatially long-ranged.
    • Fluctuation intensity exhibits a crossover dependent on wavelength relative to penetration depth (q^-4 to q^-2).

    Conclusions:

    • The predicted fluctuation behavior offers a method to differentiate between diffusion- or activation-controlled reaction regimes.
    • Experimental or simulation-based measurement of these fluctuations is feasible.
    • This work provides insights into nonequilibrium phenomena in reacting fluid systems.