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Turbulent Dufour effect and Onsager-type relations.

P Sancho1

  • 1Instituto Nacional de Meteorología, Centro Zonal de Castilla y León, Orión 1, 41071 Valladolid, Spain.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|April 24, 2002
PubMed
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A turbulent Dufour-type effect exists in nonreacting gas mixtures, extending previous research. This finding explores turbulent analogs of Onsager relations in irreversible thermodynamics.

Area of Science:

  • Thermodynamics
  • Fluid Dynamics
  • Physical Chemistry

Background:

  • The Dufour effect describes heat flux due to concentration gradients.
  • Previous work by Elperin et al. explored this in reacting systems.
  • Understanding crossed effects is crucial in irreversible thermodynamics.

Purpose of the Study:

  • To investigate the presence of a turbulent Dufour-type effect in chemically nonreacting gaseous admixtures.
  • To analyze the potential for turbulent analogs of Onsager relations.

Main Methods:

  • Theoretical analysis extending prior work.
  • Focus on gaseous admixtures under turbulent conditions.
  • Application of principles from irreversible thermodynamics.

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Main Results:

  • Demonstrated the existence of a turbulent Dufour-type effect in nonreacting gas mixtures.
  • Established a link between this effect and turbulent transport phenomena.
  • Identified conditions for the emergence of turbulent crossed effects.

Conclusions:

  • The turbulent Dufour-type effect is not limited to reacting systems.
  • This finding opens avenues for understanding turbulent analogs of Onsager relations.
  • The study contributes to the broader theory of irreversible processes in turbulent flows.