NDLI: Fluctuation Hydrodynamics, Thermophoresis of Nanoparticles and Heat Transfer in Nanofluids

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Alexandr, S. Dmitriev
Copyright Year	2012
Abstract	In this paper we studied in the framework of two-fluid hydrodynamics with fluctuations the behavior of nanoparticles in the liquid with temperature gradient [1, 2]. It is shown that the acoustic long-wave fluctuations are not damped in liquids (long-wavelength phonons) and leads to an additional force acting on the nanoparticles, as well as lead to the emergence of a new force of thermophoresis [3], which is proportional to the temperature in three second degree. It is also shown that such a thermophoresis force arising under the two-fluid hydrodynamics, can lead to instability of an ensemble of nanoparticles in the presence of a temperature gradient. The last effect leads to the possible merger of the nanoparticles in the form of elongated clusters. The appearance of such clusters on the one hand, leads to an increase in effective thermal conductivity of nanofluids, and secondly, appearing elongated clusters contribute to the propagation of long-wavelength phonons along of such clusters. In fact, this new type of heat transfer in nanofluids, which must be considered in addition to the Brownian motion of nanoparticles.
Sponsorship	Nanotechnology Institute
Starting Page	871
Ending Page	874
Page Count	4
File Format	PDF
ISBN	9780791854778
DOI	10.1115/MNHMT2012-75205
Conference Proceedings	ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer
Language	English
Publisher Date	2012-03-03
Publisher Place	Atlanta, Georgia, USA
Access Restriction	Subscribed
Subject Keyword	Temperature Nanofluids Phonons Hydrodynamics Acoustics Waves Wavelength Temperature gradient Nanoparticles Brownian motion Fluids Fluctuations (physics) Thermal conductivity Heat transfer
Content Type	Text
Resource Type	Article

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