Thermophysical Characteristics of Nanofluids and Transport Process Mechanisms

Описание

Год издания: 2019

Идентификатор DOI: 10.1166/jon.2019.1561

Ключевые слова: Nanofluid, Transport Properties, Viscosity, Thermal Conductivity, Rheology, Experiment, Molecular Dynamics Method

Аннотация: This paper analyzes the current state of the thermophysical properties of nanofluids. The experimental and molecular dynamics data on viscosity and thermal conductivity of nanofluids are are presented. It was shown that viscosity and thermal conductivity of nanofluids can not be described by the classical theories. The transport coПоказать полностьюefficients of nanofluids depend not only on the volume concentration of the particles but also on their size and material properties. The viscosity increases with decreasing particle size while the thermal conductivity increases with increasing the particle size. Using the molecular dynamics data the mechanisms of the viscosity and thermal conductivity enhancement are analyzed. It is shown that in some cases, when increasing nanoparticle concentration, rheological behavior of nanofluids becomes non-Newtonian and is well described by power-law fluid or Herschel-Bulkley fluids models. The influence of nanoparticle size and their concentration on the rheological behavior of nanofluids have been studied. The possibility of the use of traditional similarity criteria to model nanofluid flows are discussed.

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Издание

Журнал: JOURNAL OF NANOFLUIDS

Выпуск журнала: Vol. 8, Is. 1

Номера страниц: 1-16

ISSN журнала: 2169432X

Место издания: VALENCIA

Издатель: AMER SCIENTIFIC PUBLISHERS

Авторы

  • Rudyak Valery (Siberian Fed Univ, Novosibirsk State Univ Architecture & Civil Engn, Novosibirsk 630008, Russia)

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