Showing papers in "International Communications in Heat and Mass Transfer in 2012"

TL;DR: In this paper, the effect of static radial magnetic field on the thermal conductivity and viscosity of a concentric annulus between a cold outer square and heated inner circular cylinders was investigated numerically using the lattice Boltzmann method.

TL;DR: In this paper, a semi-annulus enclosure filled with nanofluid is used for natural convection heat transfer in a control volume based finite element method (CVFEM).

TL;DR: In this paper, the melting of paraffin wax dispersed with Al2O3 that is heated from one side of a square enclosure with dimensions of 25mm × 25mm is investigated numerically.

TL;DR: In this article, the authors used the control volume based finite element method (CVFEM) to simulate the fluid flow and heat transfer of Cu-water nanofluid in the presence of a horizontal magnetic field.

TL;DR: In this article, a combined experimental and numerical study is performed aiming to understand the role of buoyancy-driven convection during constrained melting of phase change materials (PCMs) inside a shell and tube heat exchanger.

TL;DR: In this article, an experimental study of convective heat transfer and pressure drop of turbulent flow of TiO2-water nanofluid through a uniformly heated horizontal circular tube has been performed.

TL;DR: In this paper, heat transfer enhancement by using CuO/water nanofluid in corrugated tube equipped with twisted tape is presented, where three different CuO concentrations: 0.3, 0.5 and 0.7% by volume, and three different twist ratios of twisted tape: y/w = 2.7, 3.6 and 5.3.

TL;DR: In this article, the effect of nanoparticles concentration on fluid properties is investigated and the results show that for a specific nanoparticle concentration, there is an increase in heat transfer coefficient of nanofluid flow compared to pure oil flow.

TL;DR: In this article, the effect of CuO nanoparticles on the thermal conductivity of base fluids like mono ethylene glycol and water was studied with regard to various factors; concentration of nanoparticles, types of base fluid, sonication time and settlement time.

TL;DR: In this paper, an experimental investigation has been carried out to study the heat transfer and pressure drop characteristics of nanofluid flow inside horizontal helical tube under constant heat flux.

TL;DR: In this article, the heat transfer enhancement of multi-walled carbon natube(MWNT)/water nanofluid in a horizontal shell and tube heat exchanger has been studied experimentally.

TL;DR: In this article, the influence of baffle turbulators on heat transfer augmentation in a rectangular channel has been investigated experimentally and numerically, and the experimental results show a significant effect of the presence of the Z-baffle on the heat transfer rate and friction loss over the smooth channel with no baffle.

TL;DR: In this paper, the convective heat transfer and friction factor of the nanofluids in a circular tube with constant wall temperature under turbulent flow conditions were investigated experimentally, and the results showed that the heat transfer coefficient of nanopharticles is higher than that of the base fluid and increased with increasing the particle concentrations.

TL;DR: In this paper, an electronic passive thermal management system was designed, which consisted of a hybrid heat sink with parallel fins sintered onto its top and copper metal foam-paraffin composite saturated in its hollow basement.

TL;DR: In this article, a vapor-liquid phase change model is proposed for volume-of-fluid (VOF) method in FLUENT, which is suitable for the case in which both unsaturated phase and saturated phase are present.

TL;DR: In this article, heat transfer enhancement of a nanofluid flow inside vertical helically coiled tubes has been investigated experimentally in the thermal entrance region, where the temperature of the tube wall was kept constant at around 95°C to have isothermal boundary condition.

TL;DR: In this article, the effect of suspension of nanoparticles on mixed convection in a square cavity with inlet and outlet ports and hot obstacle in the center of the cavity was investigated.

TL;DR: In this paper, the combined effects of magnetic field and convective diffusion of species through a non-Darcy porous medium over a vertical stretching sheet with temperature dependent viscosity and non-uniform heat source/sink were analyzed.

TL;DR: In this paper, the effects of the co-swirl motion of the ribbed tube and the double twisted tapes with various twist ratios on heat transfer and friction characteristics were examined.

TL;DR: In this article, the Laplace transform method was used to solve the problem of skin bioheat transfer analysis for constant, periodic and pulse train heat flux boundary conditions in a semi-infinite and finite domain, and the results showed that by penetrating into the depths beneath the skin subjected to heat, the amplitude of temperature response decreases significantly.

TL;DR: In this paper, the effect of using aluminum oxide nanofluid (pure water mixed with Al 2 O 3 nanoparticle with 35-nm diameter) on the thermal efficiency enhancement of a heat pipe on the different operating state was investigated.

TL;DR: In this article, thermal and hydraulic properties of turbulent nanofluids flow in a rib-groove channel are numerically investigated by means of a finite volume method (FVM), where the top and bottom walls of the channel are heated at a constant temperature.

TL;DR: In this paper, heat transfer, friction factor and thermal performance characteristics in a tube equipped with twisted-rings (TRs) are experimentally investigated and the results reveal that most TRs yield lower Nusselt numbers and friction factor than typical circular rings (CRs).

TL;DR: In this article, the effects of using different geometrical parameters with the combination of nanofluid on heat transfer and fluid flow characteristics in a helically coiled tube heat exchanger (HCTHE) are numerically investigated.

TL;DR: In this paper, the authors used nanofluids with different volume fractions of nanoparticles as a coolant for the copper minichannel heat sink, with the bottom of 20 × 20 mm laminar flow as a cooling agent.

TL;DR: In this paper, the numerical modeling of steady laminar combined convection flow in a vertical triangular wavy enclosure filled with water-CuO nanofluid is presented.

TL;DR: Comparison of the computational results between the FSI and rigid-wall models showed that the wall shear stress (WSS) distributions were substantially affected by the arterial wall compliance.

TL;DR: In this paper, the effect of nano-particles on turbulent heat transfer and pressure drop inside concentric tubes was investigated, and it was shown that adding nanoparticles in tube with high height and small pitch of corrugations augments the heat transfer significantly with negligible pressure drop penalty.

TL;DR: In this paper, a numerical analysis of a micropolar fluid flow towards a permeable stretching/shrinking sheet in a porous medium is presented, where the governing nonlinear partial differential equations are transformed into a system of ordinary differential equations by a similarity transformation, before being solved numerically by a finite-difference scheme known as the Keller-box method.

TL;DR: In this paper, forced convection heat transfer with laminar and developed flow for water-Al2O3 nanofluid inside a circular tube under constant heat flux from the wall was numerically investigated using computational fluid dynamics method.