Results 201 to 210 of about 12,961 (242)
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Journal of Colloid and Interface Science, 1973
Abstract Experimental evidence of thermophoresis in liquids is reported for 1.011 and 0.790 μm latex spheres in water and n-hexane. The thermophoretic velocity, vth, was related to the particle and liquid properties by an expression similar to Epstein's gas equation: V th =-0.26 kμ 2k+k p ρT ▽T .
G.S McNab, A Meisen
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Abstract Experimental evidence of thermophoresis in liquids is reported for 1.011 and 0.790 μm latex spheres in water and n-hexane. The thermophoretic velocity, vth, was related to the particle and liquid properties by an expression similar to Epstein's gas equation: V th =-0.26 kμ 2k+k p ρT ▽T .
G.S McNab, A Meisen
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Thermophoresis of single stranded DNA
Electrophoresis, 2010AbstractThe manipulation and analysis of biomolecules in native bulk solution is highly desired; however, few methods are available. In thermophoresis, the thermal analog to electrophoresis, molecules are moved along a microscopic temperature gradient. Its theoretical foundation is still under debate, but practical applications for analytics in biology
Philipp Reineck, Dieter Braun
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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 +2 more
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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 +2 more
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Observation of Slip Flow in Thermophoresis
Physical Review Letters, 2008Two 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
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Thermophoresis and Thermoelectricity in Surfactant Solutions
Langmuir, 2010In 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 +2 more
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Thermophoresis of colloids by mesoscale simulations
Journal of Physics: Condensed Matter, 2012The 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 +2 more
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Active thermophoresis and diffusiophoresis
Chinese Physics B, 2022Thermophoresis 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 +3 more
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Thermophoresis of nanoparticles in liquids
International Journal of Heat and Mass Transfer, 2020Abstract 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 +2 more
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Thermophoresis of Janus nanoparticles in liquids
Physical Review EIn 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 +4 more
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2011
Experiments were conducted on the motion of micron-size, spherical latex particles in stagnant liquids due to applied temperature gradients. The phenomenon, called thermophoresis, has previously been reported for gases but not for liquids. Dilute suspensions of particles in water or n-hexane were trapped between two horizontal, parallel disks.
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Experiments were conducted on the motion of micron-size, spherical latex particles in stagnant liquids due to applied temperature gradients. The phenomenon, called thermophoresis, has previously been reported for gases but not for liquids. Dilute suspensions of particles in water or n-hexane were trapped between two horizontal, parallel disks.
openaire +1 more source