Showing papers in "International Journal of Thermal Sciences in 2012"

TL;DR: In this paper, the effects of slip boundary condition in the presence of dynamic effects of nano particles have not been investigated yet, and the results of the present paper show the flow velocity and the surface shear stress on the stretching sheet and also reduced Nusselt number and reduced Sherwood number are strongly influenced by the slip parameter.

TL;DR: In this paper, a two component non-homogenous equilibrium model is used for the nanofluid that incorporates the effects of Brownian motion and thermophoresis, and variable thermal conductivity and variable viscosity are taken into account in this work.

TL;DR: The steady boundary layer free convection flow past a horizontal flat plate embedded in a porous medium filled by a water-based nanofluid containing gyrotactic microorganisms is investigated in this article.

TL;DR: In this article, a numerical study of unconstrained melting of nano-enhanced phase change materials (NEPCM) inside a spherical container using RT27 and copper particles as base material and nano-particle, respectively.

TL;DR: In this article, a carbon paper gas diffusion layer (GDL) of interdigitated PEMFC is reconstructed using the stochastic method, and its macroscopic transport properties are numerically predicted.

TL;DR: In this paper, the authors presented a simulation of multi-longitudinal vortices in a tube induced by triple and quadruple twisted tapes insertion, and the results verified the theory of the core flow heat transfer enhancement.

TL;DR: In this paper, the authors describe recent efforts in development and characterization of nanostructured thermal interface materials (TIMs) and identify possible future research directions, as well as some possible future directions for using these materials as TIMs.

TL;DR: In this article, a numerical analysis of natural convection has been performed for a two-dimensional triangular enclosure with partially heated from below and cold inclined wall filled with nanofluid in presence of magnetic field.

TL;DR: In this paper, the steady MHD laminar flow of an electrically conducting fluid on a radially stretchable rotating disk in the presence of a uniform vertical magnetic field is investigated.

TL;DR: In this paper, a numerical investigation on the application of nanofluids in micro-pin-fin heat sinks (MPFHSs) has been presented, where the three-dimensional steady Navier-Stokes and energy equations were discretized using a finite volume approach and have been solved iteratively, using the SIMPLE algorithm.

TL;DR: In this paper, the authors investigated the effects of different nozzle structures on the performance of a steam ejector with five different nozzles, namely, conical, elliptical, square, rectangular and cross-shaped.

TL;DR: In this article, the effect of Brownian motion and thermophoresis on convective flow of a nanofluid over a convectively heated vertical plate is investigated using a similarity analysis of the transport equations.

TL;DR: In this article, the effects of Grashof number and volume fraction of Cu-water nanofluid on natural convection heat transfer and fluid flow inside a two-dimensional wavy enclosure has been investigated numerically.

TL;DR: In this article, experimental results on effective thermal conductivity and specific heat capacity of ionanofluids as a function of temperature and concentration of multi-wall carbon nanotubes in several ionic liquids are presented.

TL;DR: In this paper, lattice Boltzmann method is applied to investigate the natural convection flows utilizing nanofluids in a square cavity, where the fluid in the cavity is a water-based Nanofluid containing Al2O3 or Cu nanoparticles.

TL;DR: In this article, a new method is proposed for estimating temperature-dependent thermal properties using solutions to transient inverse heat conduction problems, where the unknown thermal property is treated as the optimization variable, and the errors to be minimized are the differences between the calculated temperatures and the measured ones.

TL;DR: In this paper, the effect of internal heat source on the onset of Darcy-Brinkman convection in a porous layer saturated by nanofluid is studied, and the resulting eigenvalue problem is solved numerically using the Galerkin technique with the Rayleigh number as the eigen value.

TL;DR: In this paper, the second order slip flow and heat transfer over a stretching sheet were analyzed and the governing partial differential equations of the flow were reduced into non-linear ordinary differential equations.

TL;DR: In this paper, the effect of Rayleigh number, solid volume fraction and both Hartmann number and heat generation or absorption coefficient on the iso-contours of streamline and temperature were investigated in a square cavity filled with different nanofluids.

TL;DR: In this article, the conservation equations of mass, momentum and energy are solved using the finite volume method for varying inclination angles between 0° and 90° and two cavity height based Rayleigh numbers, Ra = 104 and 105, a Prandtl number of Pr = 102 and three cavity aspect ratios of 1, 4 and 8.

TL;DR: In this article, a bio-heat transfer equation was developed based on the dual phase-lag model for considering the effect of micro-structural interaction, which was regarded as a tri-layer composite.

TL;DR: In this article, a parametric study was conducted and effects of pertinent parameters such as Rayleigh number, the aspect ratio of the C-shaped enclosure, and the volume fraction of the Cu nanoparticles on the flow and temperature fields and the rate of heat transfer inside the enclosure were investigated.

TL;DR: In this paper, the gravity effects on the mixed convection heat transfer in a microchannel using lattice Boltzmann method were investigated. But the results showed that buoyancy forces generated a rotational cell in the microchannel flow, leading to the negative slip velocity at Kn ǫ = 0.005.

TL;DR: In this article, the Lattice Boltzmann simulation of natural convection in an open enclosure which subjugated to water/copper nanofluid has been investigated, and the results show that the average Nusselt number increases with augmentation of Rayleigh number and the volume fraction of nanoparticles for whole ranges of aspect ratios.

TL;DR: In this paper, thermal conductivity and viscosity of surfactant free and stable ethylene glycol (EG) based ZnO-nanofluids, prepared using long duration sonication, have been investigated.

TL;DR: In this article, the problem of mixed convection fluid flow and heat transfer of Al 2 O 3 -water nanofluid with temperature and nanoparticles concentration dependent thermal conductivity and effective viscosity inside a square cavity was investigated numerically.

TL;DR: In this article, a comparative study of three different mathematical models for the packed bed latent heat storage system, comprised of a cylindrical storage tank filled with paraffin encapsulated spherical containers, is presented.

TL;DR: In this article, the nucleate boiling and critical heat flux (CHF) of Fe3O4/ethylene glycol-water nanofluid at atmospheric pressure on a horizontal thin Ni-Cr wire were investigated.

TL;DR: In this article, an experimental investigation of nanoparticle suspensions utilized as nano-enhanced phase change materials (NePCM) was conducted and the experimental results were compared with the numerical predictions of a one-dimensional Stefan model.

TL;DR: In this paper, an advanced 3D finite element model for the coupled solution of heat transfer and fluid flow equations governing transformer thermal performance is presented, which is able to predict detailed thermal distribution in a specific transformer, without requiring prior knowledge of nodal temperature or temperature gradient values.