Non-isothermal mass transfer of ferrocolloids through porous membrane

Blums, Elmars; Kronkalns, G.; Mezulis, Ansis; Sints, Viesturs

doi:10.1016/j.jmmm.2010.11.041

Cited by 6 publications

(3 citation statements)

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“…The asymptotic level of particle separation σ depends of the effective Soret parameter S eff : (the sign "+" correspond to a positive Soret effect and "−" to a negative one), whereas the relaxation time of separation dynamics includes both the Soret parameter as well as the effective diffusion coefficient D eff : (11) The measured particle separation curves shown in Fig. 5 follow to the exponential law (9) very well.…”

Section: Particle Separation Through Non-isothermal Fluid Layermentioning

confidence: 80%

“…The observed very slow relaxation of the separation process allows assuming also a quasi-steadiness of the concentration gradient across the filter layer ∇φ = φ/δ, with φ being the difference in mean concentrations between both volumes measured by LC oscillators (due to convective mixing, the concentrations in both volumes also are homogenized). Under such simplification, the solution of the particle conservation equation (1) with the particle flux (4) gives the following exponential law of development of the concentration difference in volumes on both sides of the layer [11]:…”

Section: Particle Separation Through Non-isothermal Fluid Layermentioning

confidence: 99%

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Non-isothermal separation of ferrofluid particles through grids: Abnormal magnetic Soret effect

Blums

Sints

Kronkalns

et al. 2013

Comptes Rendus. Mécanique

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Nanoparticle transport through thin non-isothermal ferrofluid layer between permeable walls is investigated. The transient mass flux is determined from measurements of particle concentration changes in two fluid chambers of different temperatures which are attached on both sides of the layer. Experiments are performed employing fluid samples of small ordinary magnetic Soret effect, which is detected by thermal grating technique. The separation measurements say that a magnetic field, aligned along a temperature gradient, causes a remarkable increase in the mass diffusion coefficient and a simultaneous decrease in particle thermodiffusion mobility. It is proposed that the observed effects may be evoked by specific microconvective mass transfer induced by nonmagnetic grid elements of the permeable walls.

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Section: Particle Separation Through Non-isothermal Fluid Layermentioning

confidence: 80%

Section: Particle Separation Through Non-isothermal Fluid Layermentioning

confidence: 99%