The Dufour effect is the energy flux due to a mass concentration gradient occurring as a coupled effect of irreversible processes. The effect is named after , who studied it in 1872.Dufour, L. (1872). The Diffusion Thermoeffect. Archives des Sciences Physiques et Naturelles, 45, 9-12. It is the reciprocal phenomenon to the Soret effect. The concentration gradient results in a temperature change. For binary liquid mixtures, the Dufour effect is usually considered negligible, whereas in binary gas mixtures the effect can be significant.
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