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Determination of the thermo and magneto phoresis by the dissipative function

par Van Vaerenbergh, Stefan ;Hennenberg, Marcel ;Weyssow, Boris
Référence Zeitschrift für physikalische Chemie, 220, 2, page (209-218)
Publication Publié, 2006

Article révisé par les pairs

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Résumé :

Three different thermally induced phoresis of magnetic colloids are indentified using thermodynamics of irreversible processes. Has been used an exact and original implementation of the mechanical balance that conciliates it with the usual hydrodynamic description of phoresis used to quantify the transport coefficients. Here, only the "translational" approximation has been developed. Are so distinguished: thermomagneto chemophoresis, reversibly coupled to chemophoresis (diffusion), and irreversibly coupled to them, the thermophoresis and magnetophoresis that occurs because the system is a polarized one. The two latter are quantified respectively by the "heat of transport" and the here introduced "magnetisation of transport". The effects are better compared to thermophoresis, that can be measured individually, and reference measurements of them are mandatory to understand the experimental results. © by Oldenbourg Wissenschaftsverlag.