Showing papers in "International Communications in Heat and Mass Transfer in 2014"

TL;DR: In this paper, the convective heat transfer coefficient and friction factor for fully developed turbulent flow of MWCNT-Fe3O4/water hybrid nanofluids flowing through a uniformly-heated-atconstant-heat-flux circular tube are estimated.

TL;DR: In this paper, thermal conductivity and viscosity experiments have been conducted in temperatures between 20 and 60°C and in volume concentrations between 0.3% and 1.5%.

TL;DR: Recent developments in research on the synthesis and characterization of stationary nanofluids are summarized to try finding some challenging issues that need to be solved for future research.

TL;DR: In this article, a combined experimental and numerical study has been designed to study thermal behavior and heat transfer characteristics of Paraffin RT50 as a phase change material (PCM) during constrained melting and solidification processes inside a shell and tube heat exchanger.

TL;DR: In this paper, an experimental study is carried out to study the turbulent flow of COOH-functionalized multi-walled carbon nanotubes/water nanofluid flowing through a double tube heat exchanger.

TL;DR: In this paper, the thermal conductivity, viscosity, density, and specific heat of Al2O3 nanoparticles dispersed into water and ethylene glycol based coolant used in car radiator was investigated.

TL;DR: In this paper, a shell and tube thermal energy storage (TES) system using paraffin wax was used in a water heating system to analyze its performance for solar water heating application.

TL;DR: In this paper, a modified Hummers method was used to synthesize graphene oxide (GO) nanosheets and the effects of GO concentration and temperature on the thermal conductivity were investigated.

TL;DR: In this article, a double pipe heat exchanger with and without helical coil inserts was studied experimentally, and the measured values of heat transfer coefficient and friction factor were compared with the published literature.

TL;DR: In this article, the authors focused on the numerical modeling of steady laminar mixed convection flow in a lid-driven cavity with a wavy wall filled with a water-CuO nanofluid.

TL;DR: In this article, a study of natural convective flow, heat transfer and entropy generation in an odd-shaped geometry is presented, where the geometry considered is a combination of the horizontal and vertical enclosure shapes.

TL;DR: One of the leading tools used in passive heat transfer methods mainly at turbulence flow is twisted tape inserts and as discussed by the authors acclaims that want to review experimental researches done on this technique in recent years at the turbulent zone and with respect to the overall enhancement ratio pick the most efficient type of twisted tape.

TL;DR: In this article, the effects of water and CuO/water nanofluids (as coolants) on heat transfer coefficient, heat transfer rate, frictional loss, pressure drop, pumping power and exergy destruction in the corrugated plate heat exchanger were examined.

TL;DR: In this paper, the influence of perforated helical twisted-tapes (P-HTTs) on the heat transfer, friction loss and thermal performance characteristics under a uniform heat flux condition is reported.

TL;DR: In this paper, the effect of using the wavy-up and wavydown rectangular winglets as special forms of winglet is numerically investigated in a relatively low Reynolds number flow.

TL;DR: In this article, the heat transfer coefficient and friction factor of TiO2 and SiO2 water-based nanofluids flowing in a circular tube under turbulent flow are investigated experimentally under constant heat flux boundary condition.

TL;DR: In this paper, the authors applied response surface methodology (RSM) based on central composite design (CCD) to obtain an optimization design of finned type heat exchangers (HEX) to recover waste heat from the exhaust of a diesel engine.

TL;DR: In this article, mesoporous silica (MPSiO2) nanoparticles were dispersed in n-octadecane as an organic phase change material (PCM) in order to produce a novel composite for thermal storage.

TL;DR: In this paper, the authors explored the effects of the double counter twisted tapes on heat transfer and fluid friction characteristics in a heat exchanger tube and demonstrated that the Nusselt number, friction factor and thermal enhancement efficiency were increased with decreasing twist ratio.

TL;DR: In this paper, a car radiator was used to enhance heat transfer with nanowders, and the results showed that the Nusselt number increased with volume flow rate and slightly increased with inlet temperature and volume concentration.

TL;DR: In this article, the effect of surfactant on stability of nanofluids has been examined experimentally for two volume concentrations of 1% to 3% v/v for the optical properties.

TL;DR: In this article, the authors investigated the process of solidification and melting of a phase change material in fin and tube heat exchanger and found that utilizing fins increases fin average temperature regardless of flow regime.

TL;DR: In this article, the efficiency of Fe/ethylene glycol nanofluids as coolants is investigated in both laminar and turbulent flow regimes, and the effects of particle size, temperature and concentration of nanometres on the efficiency are examined.

TL;DR: In this article, two different approaches are taken into consideration: Euler and mixture models for numerical analysis of turbulent forced convective flow of water Al 2 O 3 nanofluid in a horizontal circular tube, exposed to convection with saturated steam at the wall, is numerically analyzed.

TL;DR: In this article, the authors presented an experimental study on turbulent flow and heat transfer characteristics in a solar air heater channel fitted with combined wavy-rib and groove turbulators, and the experimental result revealed that the combined rib-groove on both the upper and lower walls of the test channel provides the highest heat transfer rate and friction factor in comparison with the smooth channel with/without ribs.

TL;DR: In this article, the effects of three different channel shapes (hexagonal, circular, and rhombus) on the MCHS performance are investigated in details based on a number of exclusive attributes which are temperature profile, heat transfer coefficient, pressure drop, friction factor, and thermal resistance.

TL;DR: In this article, the performance of convective flow boiling heat transfer and particulate fouling of CuO/EG nanofluids has been experimentally studied inside the annular heat exchanger.

TL;DR: In this article, the thermal performance of a wickless thermosyphon heat pipe charged with a biologically-produced ecofriendly working fluid is experimentally studied and the results showed that using the nanoparticles leads to the reduction in temperature distribution and enhances thermal performance.

TL;DR: In this article, the cooling performance of water-based Boehmite (AlOOH·xH2O) nanofluid in a hybrid photovoltaic (PV) cell was investigated.

TL;DR: In this paper, the authors present an overview of literature dealing with recent developments in the study of heat transfer using nanofluids in heat pipes and some important inferences from the various papers are also highlighted.