Journal ArticleDOI
Characteristics of heat transfer and fluid flow in microtube and microchannel using conventional fluids and nanofluids: A review
TLDR
In this paper, a review summarizes numerous researches on two topics; the first section focuses on studying the fluid flow and heat transfer behavior of different types of microtubes (MT) and microchannel (MC) at different orientations.Abstract:
Research on convective heat transfer on internal microtube and microchannel has been extensively conducted in the past decade. This review summarizes numerous researches on two topics; the first section focuses on studying the fluid flow and heat transfer behavior of different types of microtubes (MT) and microchannel (MC) at different orientations. The second section concentrates on nanofluids; its preparation, properties, behavior, and many others. The purpose of this article is to get a clear view and detailed summary of the influence of several parameters such as the geometrical specifications, boundary conditions, and type of fluids. The maximum Nusselt number is the main target of such research where correlation equations were developed in experimental and numerical studies are reported. The heat transfer enhancement of nanofluids along with the nanofluids preparation technique, types and shapes of nanoparticles, base fluids and additives, transport mechanisms, and stability of the suspension are also discussed.read more
Citations
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TL;DR: In this paper, an optical beam deflection technique was used for measurements of the thermal diffusivity of fluid mixtures and suspensions of nanoparticles with a precision of better than 1%.
Journal ArticleDOI
A comprehensive review of thermo-physical properties and convective heat transfer to nanofluids
K.H. Solangi,Salim Newaz Kazi,M. R. Luhur,Ahmad Badarudin,Ahmad Amiri,Rad Sadri,Mohd Nashrul Mohd Zubir,Samira Gharehkhani,K.H. Teng +8 more
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Journal ArticleDOI
Ferrofluid flow and heat transfer in a semi annulus enclosure in the presence of magnetic source considering thermal radiation
TL;DR: In this article, the authors investigated thermal radiation in a semi annulus enclosure with Ferrohydrodynamic and magnetohydrodynamic (MHD) flow and heat transfer and showed that Nusselt number is an increasing function of Rayleigh number, nanoparticle volume fraction, magnetic number while it is a decreasing function of with Hartmann number and radiation parameter.
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Graphene based nanofluids and nanolubricants – Review of recent developments
TL;DR: An overview of the remarkable research progress on graphene-based nanofluids and nanolubricants witnessed in the recent years is presented in this article, where the authors highlight various synthesis methods, characterization techniques and properties measurement procedures that have been experimented and developed.
References
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Journal ArticleDOI
Convective Transport in Nanofluids
TL;DR: In this article, the authors considered seven slip mechanisms that can produce a relative velocity between the nanoparticles and the base fluid and concluded that only Brownian diffusion and thermophoresis are important slip mechanisms in nanofluids.
Journal ArticleDOI
Anomalously increased effective thermal conductivities of ethylene glycol-based nanofluids containing copper nanoparticles
TL;DR: In this paper, it was shown that a "nanofluid" consisting of copper nanometer-sized particles dispersed in ethylene glycol has a much higher effective thermal conductivity than either pure or pure glycol or even polyethylene glycol containing the same volume fraction of dispersed oxide nanoparticles.
Journal ArticleDOI
Mechanisms of heat flow in suspensions of nano-sized particles (nanofluids)
TL;DR: In this paper, the authors explore four possible explanations for the anomalous thermal conductivity of nanofluids: Brownian motion of the particles, molecular-level layering of the liquid at the liquid/particle interface, the nature of heat transport in the nanoparticles, and the effects of nanoparticle clustering.
Journal ArticleDOI
A review on applications and challenges of nanofluids
TL;DR: It has been found nan ofluids have a much higher and strongly temperature-dependent thermal conductivity at very low particle concentrations than conventional fluids, which can be considered as one of the key parameters for enhanced performances for many of the applications of nanofluids.
Journal ArticleDOI
Experimental investigation into convective heat transfer of nanofluids at the entrance region under laminar flow conditions
Dongsheng Wen,Yulong Ding +1 more
TL;DR: In this article, an experimental work on the convective heat transfer of nanofluids, made of γ-Al2O3 nanoparticles and de-ionized water, flowing through a copper tube in the laminar flow regime was conducted.