Results 171 to 180 of about 9,725 (215)

Thermophoresis in gases

Soviet Physics Uspekhi, 1979
We analyze the mechanisms that cause the motion of objects suspended in inhomogeneously heated gases. We treat two limiting cases: a) a highly rarefied gas in which the mean free path λ of the gas molecules is large in comparison with the characteristic dimension R of the object, and b) a weakly rarefied gas that satisfies the condition λ R.
S.P. Bakanov, B.V. Deryagin, Vyacheslav I. Roldugin   +2 more
openaire   +1 more source

Thermophoresis and Thermoelectricity in Surfactant Solutions

Langmuir, 2010
In electrolyte solutions, the differential migration of the ionic species induced by the presence of a thermal gradient leads to the buildup of a steady-state electric field. Similarly to what happens for the Seebeck effect in solids, the sample behaves therefore as a thermocell. Here, we provide clear evidence for the presence of thermoelectric fields
VIGOLO, DANIELE, BUZZACCARO, STEFANO, PIAZZA, ROBERTO   +2 more
openaire   +3 more sources

Observation of Slip Flow in Thermophoresis

Physical Review Letters, 2008
Two differing theories aim to describe fluidic thermophoresis, the movement of particles along a temperature gradient. While thermodynamic approaches rely on local equilibrium, hydrodynamic descriptions assume a quasi-slip-flow boundary condition at the particle's surface. Evidence for slip flow is presented for the case of thermal gradients exceeding (
Franz M, Weinert, Dieter, Braun
openaire   +2 more sources

Thermophoresis of colloids by mesoscale simulations

Journal of Physics: Condensed Matter, 2012
The motion of a colloid induced by a temperature gradient is simulated by means of multiparticle collision dynamics, a mesoscale simulation technique. Two algorithms to quantify the thermophoretic behavior are employed and contrasted. The validity of the methods is verified as a function of the temperature gradient, system size, and algorithm ...
Daniel, Lüsebrink, Mingcheng, Yang, Marisol, Ripoll   +2 more
openaire   +2 more sources

Active thermophoresis and diffusiophoresis

Chinese Physics B, 2022
Thermophoresis and diffusiophoresis respectively refer to the directed drift of suspended particles in solutions with external thermal and chemical gradients, which have been widely used in the manipulation of mesoscopic particles. We here study a phoretic-like motion of a passive colloidal particle immersed in inhomogeneous active baths, where the ...
Huan Liang, Peng Liu, Fangfu Ye, Mingcheng Yang   +3 more
openaire   +1 more source

Thermophoresis of Aerosol Particles

Nature, 1962
THE velocity of thermophoresis v of small aerosol particles of radius R, much smaller than the free path λ of the surrounding gas molecules, has been calculated by us1 in two ways: (1) as a limiting case of thermodiffusion; (2) by finding the momentum imparted to the particles by impact of molecules the velocity distribution of which is not disturbed ...
B. V. DERJAGUIN, S. P. BAKANOV
openaire   +1 more source

Thermophoresis in colloidal suspensions

Journal of Physics: Condensed Matter, 2008
Thermophoresis is particle motion induced by thermal gradients. Akin to other driven transport processes, such as the Soret effect in simple fluid mixtures, or electrophoresis and diffusiophoresis in colloidal suspensions, it is, both experimentally and theoretically, a challenging subject.
PIAZZA, ROBERTO, PAROLA A.
openaire   +2 more sources

Thermophoresis of nanoparticles in liquids

International Journal of Heat and Mass Transfer, 2020
Abstract Thermophoresis is the movement of particles in a fluid subjected to a steady temperature gradient, where the fluid molecules at the hotter region possessing higher kinetic energy drive the particles towards the colder region. This paper presents a molecular dynamics simulation to obtain the effects of the particle shape, size and orientation
Saran Ramachandran, C.B. Sobhan, G.P. Peterson   +2 more
openaire   +1 more source

Thermophoresis of Janus nanoparticles in liquids

Physical Review E
In this work, we investigate the thermophoresis of Janus nanoparticles in liquids through molecular dynamics simulations. Thermophoretic forces acting on cylindrical Janus nanoparticles are calculated through MD simulations by varying the particle size, the heterogenous surface energies, and the mean temperature of the fluid.
Shaobin Zhuo, Kai Qi, Baoling Huang, Jun Wang, Zhigang Li   +4 more
openaire   +2 more sources

Thermophoresis in binary blends

Mechanics of Materials, 2012
Abstract Various types of temperature sensitive binary blends are employed in modern technical applications, e.g., polymer solutions in adhesives, lubricants or in coating implementations. In this paper we deduce and thoroughly investigate a model of segregation of such blends in the presence of a locally non-uniform temperature field. Capturing the
Denis Anders, Kerstin Weinberg
openaire   +1 more source