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2012-03-07

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/133403

Thermomolecular Orientation of Nonpolar Fluids

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https://doi.org/10.1103/PhysRevLett.108.105901

Abstract

We investigate the response of molecular fluids to temperature gradients. Using nonequilibrium molecular dynamics computer simulations we show that nonpolar diatomic fluids adopt a preferred orientation as a response to a temperature gradient. We find that the magnitude of this thermomolecular orientation effect is proportional to the strength of the temperature gradient and the degree of molecular anisotropy, as defined by the different size or mass of the molecular atomic sites. We show that the preferred orientation of the molecules follows the same trends observed in the Soret effect of binary mixtures. We argue this is a general effect that should be observed in a wide range of length scales.

Subject

Dinàmica de fluids, Dinàmica molecular

Subject (English)

Fluid dynamics, Molecular dynamics

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Articles publicats en revistes (Física de la Matèria Condensada)

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RÖMER, Frank, et al. Thermomolecular Orientation of Nonpolar Fluids. Physical Review Letters. 2012. Vol. 108, num. 10, pags. 105901. ISSN 0031-9007. [consulted: 8 of June of 2026]. Available at: https://hdl.handle.net/2445/133403

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