thermophoresis


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thermophoresis

[‚thər·mə·fə′rē·səs]
(thermodynamics)
The movement of particles in a thermal gradient from high to low temperatures.
References in periodicals archive ?
Tenders are invited for Microscale Thermophoresis (MST)
The Brownian diffusion and thermophoresis effects were been considered as the most important slip mechanism among others seven factors considered (Buongiorno and Hu 2005).
The obtained analytical solutions are used to investigate the effects of the Brownian motion parameter, thermophoresis parameter, Hartmann number, Lewis number and pressure gradient parameters, slip, and temperature jump boundary conditions on fluid behavior of the nanofluid.
[6] considered the Brownian and thermophoresis diffusions and found the heat transfer reduction by increasing the bulk volume fraction of nanoparticles.
It was also reported that thermophoresis (also called thermodiffusion, thermomigration, the Ludwig-Soret effect, or the Sort effect), which is a phenomenon exhibited in a mixture of particles that tends to response differently to the force of a temperature gradient, can influence the effective thermal conductivity of nanofluids at high temperatures, but such theory was never proven by any of the published literature up to now [229, 230].
The primary mechanism of this soot sampling process is the thermophoresis caused by the temperature gradient within the thermal boundary layer formed on the relatively low temperature TEM grid surface.
For example, Nick Lane notes: "Thermal currents through microporous labyrinths of alkaline hydrothermal vents have a remarkable capacity to concentrate organic molecules including amino acids, fatty acids and nucleotides to extreme levels, thousands or even millions of times the starting concentration, by way of a process known as thermophoresis", noting that, "...
Probing the cooperativity of binding networks with high-throughput thermophoresis. Anal Chem 2017; 89: 2592-2597, doi: 10.1021/acs.analchem.
An analytical model for convective transport in nanofluids considering of the Brownian diffusion and thermophoresis are studied by Buongiorno and Hu [5].
Those phenomena can be revealed by the particle motion which is mainly controlled by the fluid drag and thermophoresis forces in the plasma jet.
These are inertia, Brownian diffusion, thermophoresis, diffusiophoresis, Magnus effect, fluid drainage, and gravity settling.
Besides the heating, the thermal insulation can reduce the particle thermophoresis deposition in the sample pipe, so the particle concentration can be preserved uniformly, except for the fluctuation of the operating condition of the particle source.