Showing papers in "International Communications in Heat and Mass Transfer in 2013"

TL;DR: In this paper, experimental investigations and theoretical determination of effective thermal conductivity and viscosity of magnetic Fe3O4/water nanofluid are reported, and theoretical equations are developed to predict thermal conductivities and viscoales of nanoflids without resorting to the well established Maxwell and Einstein models, respectively.

TL;DR: In this paper, the thermal conductivity of Al2O3 and CuO nanofluids has been estimated experimentally at different volume concentrations and temperatures at different volumes and temperatures.

TL;DR: In this paper, the experimental results revealed that both heat transfer rate and friction factor of the tube fitted with perforated twisted tapes were significantly higher than those of the plain tube.

TL;DR: In this article, the thermophysical properties of 60:40 (by mass) ethylene glycol/water mixture and water based alumina nanofluids were investigated for flat plate solar collector.

TL;DR: In this paper, the effect of multi-walled carbon nanotubes (MWCNTs) in different concentrations on some of the properties of engine oils was studied, including Viscosity, pour point, flash point and thermal conductivity.

TL;DR: In this article, the control volume based finite element method is applied to solve the problem of natural convection heat transfer in an enclosure filled with nanofluid, and the important effect of Brownian motion and thermophoresis has been included in the model of nanofluid.

TL;DR: In this paper, the effect of using louvered strip inserts placed in a circular double pipe heat exchanger on the thermal and flow fields utilizing various types of nanofluids is studied numerically.

TL;DR: In this paper, a CFD modeling of laminar forced convection on Al 2 O 3 nanofluid with size particles equal to 33nm and particle concentrations of 0.5, 1 and 6.wt.

TL;DR: In this paper, the thermal conductivity of Fe3O4 nanofluid was investigated experimentally in the temperature range from 20°C to 60°C and in the volume concentration range from 0.2% to 2.0%.

TL;DR: In this article, the effect of a magnetic field on natural convection in an open enclosure which subjugated to water/alumina nanofluid using Lattice Boltzmann method has been investigated.

TL;DR: In this paper, the effect of orientation of the heat sink on thermal performance is studied by developing a tracking system, capable of placing a heat sink at any specified orientation, which is used to mimic the heat generation in electronic chips.

TL;DR: In this article, the effect of different nanoparticle shapes (such as cylindrical, bricks, blades, platelets, and spherical) on the performance of a shell and tube heat exchanger operating with nanofluid analytically was studied.

TL;DR: In this article, thermal conductivity and viscosity of the Al 2 O 3 /R141b nanorefrigerant for 0.5 to 2 vol.% concentrations at temperatures of 5 to 20°C have been investigated.

TL;DR: In this paper, various parameters that effect on the surface tension of nanofluids such as nanoflide preparation method, effect of volume fraction, temperature, and surfactants have been studied.

TL;DR: In this paper, the onset of nucleate boiling has been measured and the influence of the wettability has been quantified, as the inherent mean roughness of the glass substrates was lower than one nanometer.

TL;DR: In this paper, the nanosheet Graphene was synthesized by using CVD method and the best result shows enhancement of thermal conductivity around 14.1% for the sample with 0.05% of AFG compared to water at 25°C and 17% at 50°C.

TL;DR: In this paper, the thermal conductivities of nanofluid solutions are measured via the LAMBDA measuring system by transient hot wire method and compared as function of dispersing two different surfactants.

TL;DR: In this article, the influence of triple twisted tape inserts on heat transfer rate, friction factor and thermal enhancement efficiency were experimentally investigated using mild steel triple twisted tapes with four different twist ratios (y ǫ = 1.92, 2.88, 4.81 and 6.79).

TL;DR: In this paper, a set of three nanofluids of different blends were prepared with ethylene glycol-water and TiO 2 nanoparticles and were characterized for thermal conductivity as a function of temperature and volume concentration of nanoparticles.

TL;DR: In this article, a three-dimensional transient model for the study of the subsurface heat exchange process in enhanced geothermal systems (EGS) is developed, where the geometry of interest physically consists of multiple domains: open channels for injection and production wells, the artificial heat reservoir, and the rock enclosing the heat reservoir.

TL;DR: In this paper, an experimental study was carried out in order to find out the effects of Al2O3 nanofluid with a mean diameter of 20nm on heat transfer, pressure drop and thermal performance of a double tubes heat exchanger.

TL;DR: In this article, the influence of nanofluid application on pressure drop and entropy generation is investigated in a plate heat exchanger and the effects on thermophysical properties and heat transfer characteristics are compared with the base fluid.

TL;DR: In this article, an analytical solution is presented on the entropy generation due to mixed convection between two isothermal cylinders where a transverse magnetic field is applied to the system, and the governing equations in cylindrical coordinates are simplified and solved to obtain the distribution of entropy generation and the effects of MHD flow on it.

TL;DR: In this paper, the thermal performance of forced pulsating flow at a backward facing step with a stationary cylinder subjected to nanofluid is presented, where the governing equations are solved with a finite volume based code.

TL;DR: Nucleate pool boiling of Al2O3-based aqueous nanofluid on flat plate heater has been studied experimentally as mentioned in this paper, where the surface roughness increases or decreases depending on initial condition of heater surface.

TL;DR: In this article, the heat transfer characteristics of nanofluids cooling in the mini-rectangular fin heat sink are studied, which is the mixture of de-ionized water and nanoscale TiO2 particles.

TL;DR: In this paper, the effect of nano-particles in heat transfer augmentation for smooth tube and helically corrugation tubes (HCT) was discussed and their relative Nusselt number was compared.

TL;DR: In this article, different carbon nanostructures including multi-walled carbon nanotubes (MWCNTs), graphene nanosheets (G), carbon nanoballs (CNBs) and fullerene nanoparticles (C60) were added to SAE 20W50 engine oil.

TL;DR: In this article, the effects of different geometrical parameters on the thermal and flow fields through transversely corrugated circular tubes with Reynolds number ranging from 5000 to 60,000 and heat flux of 50 W/cm2 were investigated.

TL;DR: In this article, the authors investigated the fully developed forced convection heat and mass transfer in a horizontal porous channel filled with a nanofluid, where the walls of the channel are subject to a constant heat flux.