Journal ArticleDOI
Investigation on Convective Heat Transfer and Flow Features of Nanofluids
Yimin Xuan,Qiang Li +1 more
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TLDR
In this article, an innovative new class of heat transfer fluids can be engineered by suspending metallic nanoparticles in conventional heat-transfer fluids, which are expected to exhibit high thermal conductivities compared to those of currently used heat transfer fluid, and they represent the best hope for enhancing heat transfer.Abstract:
Low thermal conductivity is a primary limitation in the development of energy-efficient heat transfer fluids that are required in many industrial applications. In this paper we propose that an innovative new class of heat transfer fluids can be engineered by suspending metallic nanoparticles in conventional heat transfer fluids. The resulting {open_quotes}nanofluids{close_quotes} are expected to exhibit high thermal conductivities compared to those of currently used heat transfer fluids, and they represent the best hope for enhancement of heat transfer. The results of a theoretical study of the thermal conductivity of nanofluids with copper nanophase materials are presented, the potential benefits of the fluids are estimated, and it is shown that one of the benefits of nanofluids will be dramatic reductions in heat exchanger pumping power.read more
Citations
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The effects of different nano particles of Al2O3 and Ag on the MHD nano fluid flow and heat transfer in a microchannel including slip velocity and temperature jump
TL;DR: In this paper, the forced convection of nanofluid flow in a long microchannel is studied numerically according to the finite volume approach and by using a developed computer code.
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On heat and mass transfer analysis for the flow of a nanofluid between rotating parallel plates
TL;DR: In this paper, the authors have considered the three dimensional heat and mass transfer with magnetic effects for the flow of a nanofluid between two parallel plates in a rotating system and applied Homotopy Analysis Method (HAM) to see the validity of analytical solution, a numerical solution using RK-4 method coupled with shooting method has also been sought Both the solutions are found to be in excellent agreement to capture the effects of involved physical parameters graphical representation of the flow are included with comprehensive discussions.
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Comparison of single and two-phase models for nanofluid convection at the entrance of a uniformly heated tube
TL;DR: In this paper, the authors compared single-phase and two-phase models to predict convective heat transfer coefficient and friction factor at the entry region of uniformly heated pipe, and found that the simulation results showed that the Eulerian-Eulerian model can reduce the computational cost by up to 50% in terms of accuracy and computational cost.
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Influence of operational and design parameters on the performance of a PCM based heat exchanger for thermal energy storage – A review
TL;DR: In this paper, an in-depth analysis of various operating conditions and design parameters that need to be considered in the design of a phase change materials (PCM) based heat exchanger is presented.
Journal ArticleDOI
Flow and heat transfer analysis of Williamson nanofluid
Sohail Nadeem,Shafiq Hussain +1 more
TL;DR: In this article, the boundary layer equations of nano Williamson fluid model along with energy and nanoparticle volume fraction are presented and simplified with the help of useful transformations, and expressions for coefficients of skin friction and Nusselt number have been computed.
References
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Book
Introduction to Heat Transfer
TL;DR: In this article, the physical concepts and methodologies of heat and mass transfer are explained for advanced undergraduate engineering majors, using a systematic method for problem solving and discusses the relationship of heat transfer to many important practical applications through examples and problems.
Journal ArticleDOI
Hydrodynamic and heat transfer study of dispersed fluids with submicron metallic oxide particles
Bock Choon Pak,Young I. Cho +1 more
TL;DR: In this article, the authors used a Brookfield rotating viscometer to measure the viscosities of the dispersed fluids with γ-alumina (Al2O3) and titanium dioxide (TiO2) particles at a 10% volume concentration.
Journal ArticleDOI
Thermal Conductivity of Heterogeneous Two-Component Systems
R. L. Hamilton,O. K. Crosser +1 more
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Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles
TL;DR: In this paper, a transient hot-wire method was used to measure the thermal conductivity of a small amount of nanoparticles and the experimental results showed that these nanoparticles have substantially higher thermal conductivities than the same liquids without nanoparticles.
Journal ArticleDOI
Conceptions for heat transfer correlation of nanofluids
Yimin Xuan,Wilfried Roetzel +1 more
TL;DR: In this article, the authors proposed two different approaches for deriving heat transfer correlation of the nanofluid, and investigated the mechanism of heat transfer enhancement of the nano-fluid.