期刊
EUROPEAN PHYSICAL JOURNAL E
卷 41, 期 1, 页码 -出版社
SPRINGER
DOI: 10.1140/epje/i2018-11610-3
关键词
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资金
- Winton Programme for the Physics of Sustainability
- European Union through the European Training Network NANOTRANS [674979]
- MINECO [FIS2015-67837-P]
- DURSI [2014SGR-922]
We use the dynamic length and time scale separation in suspensions to formulate a general description of colloidal thermophoresis. Our approach allows an unambiguous definition of separate contributions to the colloidal flux and clarifies the physical mechanisms behind non-equilibrium motion of colloids. In particular, we derive an expression for the interfacial force density that drives single-particle thermophoresis in non-ideal fluids. The issuing relations for the transport coefficients explicitly show that interfacial thermophoresis has a hydrodynamic character that cannot be explained by a purely thermodynamic consideration. Our treatment generalises the results from other existing approaches, giving them a clear interpretation within the framework of non-equilibrium thermodynamics.
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