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The Kramers’ equation of Brownian motion is applied to investigate the motion of a colloidal particle in a medium subjected to a temperature gradient. The equation is generalized in two ways. First, a chemical force is included in order to account for the non-ideality of the colloidal...
Persistent link: https://www.econbiz.de/10010873727
The paper aims at a molecular understanding of thermodiffusion (the Ludwig–Soret effect) in a liquid binary mixture. To … thermodiffusion. The force driving thermodiffusion arises from Onsager’s reciprocity theorem in non-equilibrium thermodynamics: it is … explicit kinetic expression is given of the force driving thermodiffusion; it involves the interaction cross-section of the two …
Persistent link: https://www.econbiz.de/10010591077
shed light on thermodiffusion (the Ludwig–Soret effect), which often combines inhomogeneities of both kinds. Finally, a … limitation of the Lorentz picture of transport in accounting for thermodiffusion is outlined. …
Persistent link: https://www.econbiz.de/10010872718
We experimentally investigate the scaling probability distributions of various intrachain distances of granular chains … in two-dimensional static packing, the chain length of which ranges from N=64 to 2048. With the scaling method proposed … in the polymer theory, the scaled data from granular chains tend to cluster together so as to form a single experimental …
Persistent link: https://www.econbiz.de/10010872439
/solvent molecular size ratio. The results of the theory are shown to accord well with experiments on polymer solutions in regard to both …
Persistent link: https://www.econbiz.de/10010590622
diffusion coefficients, is extended onto thermodiffusion coefficients and heat conductivities. The derivation of the expressions …
Persistent link: https://www.econbiz.de/10010588957
Thermodiffusion of particles suspended in a pure liquid is a thorny problem which has not yet received a solution … relative to the carrier fluid. Focussing on thermodiffusion, we show that the osmotic pressure is irrelevant and that … thermodiffusion cannot have but two distinct origins : the temperature dependence of the stress associated with the distorted particle …
Persistent link: https://www.econbiz.de/10010591840
presence of temperature gradients. It is found that temperature gradients not only introduce a thermophoresis force, but also … compared with each other and with the thermophoresis force. …
Persistent link: https://www.econbiz.de/10010874496
A purely continuum theory for the thermophoretic velocity of aerosol and hydrosol particles in the zero Knudsen number, near continuum limit, Kn=0+, valid for both gases and liquids, is proposed. This theoretical result is based upon a fundamentally modified version of the traditional equations...
Persistent link: https://www.econbiz.de/10010871980
Experimental investigations on thermophysical properties and forced convective heat transfer characteristics of various nanofluids are reviewed and the mechanisms proposed for the alteration in their values or characteristics due to the addition of nanoparticles are summarized in this review. A...
Persistent link: https://www.econbiz.de/10010664473