Thermodiffusion in Porous Media and Its Consequences

Study of the thermal diffusion behavior of simple binary mixtures

“…The non-equilibrium part in the model is accounted by incorporating the energy of viscous flow. The expression obtained for the thermal diffusion factor in a binary mixture has the form of: 30) where U i and V i are partial molar volume and partial molar internal energy, τ i is the ratio of the energy of vaporization and the energy of viscous flow for component i. This model together with two previously developed models of Kempers [71] and Rutherford [138] were tested for three groups of mixtures: hydrocarbon systems CH 4 Semenov model Semenov and Schimpf [151], derived expressions for the thermal diffusion coefficient for a liquid mixture by hydrodynamic approach.…”

“…In some cases, even qualitative predictions, which are of practical importance, are impossible. The main practical applications are separation processes [145,29] such as thermal field flow fractionation of polymers and colloids or isotope separation, characterization of geochemical processes [66,30] and combustion [128].…”

“…is of practical relevance, because the determination of reliable model parameters is essential for the characterization of geological fields [30,57,58]. Additionally the effect plays also an important role in separation techniques for liquid mixtures (see e.g.…”

“…The effect has important technical applications for example in the modeling of the separation of crude oil components under the influence of thermal diffusion in geological conditions [30,57,58] ; it also plays an important role in separation techniques for liquid mixtures (see e.g. Refs.…”

“…The technical applications are isotope separation of liquids and gaseous mixtures [122], thermal field flow fractionation of polymers and colloids [145,29], identification and separation of crude oil components [30], coating of metallic items, etc. This phenomenon is supposed to play an important role in crystal growth [136] and combustion [128].…”