Physical origin of nonequilibrium fluctuation-induced forces in fluids.

Kirkpatrick, T R; Ortiz de Zárate, J M; Sengers, J V

Kirkpatrick, T R; Ortiz de Zárate, J M; Sengers, J V.

Afiliación

Kirkpatrick TR; Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, USA.
Ortiz de Zárate JM; Department of Physics, University of Maryland, College Park, Maryland 20742, USA.
Sengers JV; Departamento de Física Aplicada I, Facultad de Física, Universidad Complutense, 28040 Madrid, Spain.

Phys Rev E ; 93(1): 012148, 2016 Jan.

Article en En | MEDLINE | ID: mdl-26871063

RESUMEN

Long-range thermal fluctuations appear in fluids in nonequilibrium states leading to fluctuation-induced Casimir-like forces. Two distinct mechanisms have been identified for the origin of the long-range nonequilibrium fluctuations in fluids subjected to a temperature or concentration gradient. One is a coupling between the heat or mass-diffusion mode with a viscous mode in fluids subjected to a temperature or concentration gradient. Another one is the spatial inhomogeneity of thermal noise in the presence of a gradient. We show that in fluids fluctuation-induced forces arising from mode coupling are several orders of magnitude larger than those from inhomogeneous noise.

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev E Año: 2016 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

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