Thermoelectricity and Thermodiffusion in Magnetic Nanofluids: Entropic Analysis

An analytical model describing the thermoelectric potential production in magnetic nanofluids (dispersions of magnetic and charged colloidal particles in liquid media) is presented. The two major entropy sources, the thermogalvanic and thermodiffusion processes are considered. The thermodiffusion te...

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Bibliographic Details
Published in:Entropy (Basel, Switzerland) Switzerland), 2018-05, Vol.20 (6), p.405
Main Authors: Salez, Thomas, Nakamae, Sawako, Perzynski, Régine, Mériguet, Guillaume, Cebers, Andrejs, Roger, Michel
Format: Article
Language:English
Subjects:
colloids
Condensed Matter
Electromagnetism
Engineering Sciences
nanofluids
Other
Physics
seebeck coefficient
thermodiffusion
thermoelectricity
thermogalvanic cells
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Summary:An analytical model describing the thermoelectric potential production in magnetic nanofluids (dispersions of magnetic and charged colloidal particles in liquid media) is presented. The two major entropy sources, the thermogalvanic and thermodiffusion processes are considered. The thermodiffusion term is described in terms of three physical parameters; the diffusion coefficient, the Eastman entropy of transfer and the electrophoretic charge number of colloidal particles, which all depend on the particle concentration and the applied magnetic field strength and direction. The results are combined with well-known formulation of thermoelectric potential in thermogalvanic cells and compared to the recent observation of Seebeck coefficient enhancement/diminution in magnetic nanofluids in polar media.
ISSN:1099-4300
1099-4300
DOI:10.3390/e20060405