Showing papers in "International Journal of Thermal Sciences in 2005"

TL;DR: Ding et al. as discussed by the authors used a transient hot-wire apparatus with an integrated correlation model to measure the thermal conductivities of these nanofluids more conveniently, and they also characterized the pH value and viscosity of the nanoparticles.

TL;DR: In this paper, the validity of friction factor theory based upon conventional sized passages for microchannel flows is still an active area of research and the discrepancies in literature need to be addressed in order to generate a set of design equations to predict the pressure drop occurring in microchannel flow devices.

TL;DR: In this paper, the effect of the Lewis factor on the performance prediction of natural draft and mechanical draft wet-cooling towers is investigated, where the authors show that the amount of water that evaporates, however, is a function of the actual value of Lewis factor.

TL;DR: In this article, the authors studied the effect of angle, inclination angle, and length of the heat source on the convection and heat transfer process in a rectilinear cavity.

TL;DR: In this paper, both analytical and numerical analyses of fully developed forced convection and entropy generation in a fluid-saturated porous medium channel bounded by two parallel plates are presented, where the flow in the porous material is described by the Darcy-Brinkman momentum equation.

TL;DR: In this paper, the authors focused on the study of unsteady heat and mass transfer by mixed convection flow over a vertical permeable cone rotating in an ambient fluid with a time-dependent angular velocity in the presence of a magnetic field and heat generation or absorption effects.

TL;DR: An online adaptive strategy for the fault detection and diagnosis of centrifugal chiller systems based on six physical performance indexes, validated by both field data collected from a real building chiller system and by laboratory data provided by an ASHRAE research project.

TL;DR: In this article, a simulation of experiments on turbulent convection heat transfer of carbon dioxide at supercritical pressures in a vertical tube of diameter 0.948 mm has been carried out using low-Reynolds number eddy viscosity turbulence models.

TL;DR: In this article, the effect of temperature gradient inside fuel droplets on droplet evaporation, break-up and the ignition of fuel vapour/air mixture is investigated based on a zero-dimensional code.

TL;DR: It is demonstrated that the results of four-objective optimization can include those of two- objective optimization and, therefore, provide more choices for optimal design of thermodynamic cycle of ideal turbojet engines.

TL;DR: In this paper, the performance of an air-standard Otto cycle with heat transfer loss and variable specific heat of working fluid is analyzed by using finite-time thermodynamics, and the relationship between the power output and the compression ratio is derived by detailed numerical examples.

TL;DR: In this article, an exergy loss based economic analysis of biomass utilization is proposed, which shows the opportunity of using biomass in plants with a thermodynamic efficiency higher than a minimum value.

TL;DR: In this article, the thermodynamic modeling of a polymer electrolyte membrane (PEM) fuel cell power system for transportation applications is presented, which includes the operation of all the components in the system, consisting of two major modules: PEM fuel cell stack module and system module and a cooling pump.

TL;DR: The study shows that the economic implementation of renewable energy (solar) is even more difficult, compared to Diesel based solutions, in cases of isolated communities with high load variations and new infrastructure or retrofit cases are considered.

TL;DR: In this article, the effect of the buoyancy force and thermal radiation in MHD boundary layer visco-elastic fluid flow over continuously moving stretching surface embedded in a porous medium is analyzed.

TL;DR: In this article, the influence of the initial water height and the depressurization rate on the flash evaporation of a water film was investigated, and dimensionless correlations between these parameters were proposed.

TL;DR: In this paper, a combined experimental approach has been exploited to analyze heat transfer by initially laminar and transitional submerged, unconfined gaseous jet impingement on a plane target.

TL;DR: In this article, a technique based on infrared thermography is used to determine the convective heat transfer on a flat plate on which either a single circular air jet or a row of jets impinged.

TL;DR: In this article, the authors review recent progress on constructal theory and design of flow structures, focusing on the development of multi-scale, non-uniformly distributed flow structures that offer increased compactness.

TL;DR: In this article, the effect of surface tension on laminar natural convection flow of an electrically conducting fluid in a rectangular enclosure under an externally imposed magnetic field with internal heat generation has been investigated.

TL;DR: This study studies the coupling of such an Ericsson engine with a system of natural gas combustion, and carries out classic energy, exergy and exergo-economic analyses, confirming the interest of such systems for micro-cogeneration purposes.

TL;DR: In this paper, generalized correlations are evolved to predict friction factors and convective heat transfer coefficients with twisted tapes in a tube for a wide range of Reynolds numbers and Prandtl numbers.

TL;DR: In this article, a time-dependent and 3D model of the plasma spray process is presented to provide a useful insight in the time-evolution of the performance of the process.

TL;DR: In this paper, the effect of step height on turbulent mixed convection flow along a vertical flat plate was examined for step heights of 0, 11, and 22 mm at a free stream air velocity, u ∞, of 0.55 m⋅s−1, and a temperature difference, ΔT, of 30 ǫ°C between the heated walls and the free flow air (corresponding to a local Grashof number Gr x i = 6.45 × 10 10 ).

TL;DR: In this paper, the authors examined numerically and theoretically the application of truncated Singular Value Decomposition (SVD) in a sequential form and showed that the most suitable reduced rank is "one".

TL;DR: In this article, an exergetic efficiency optimization that combines exergy concept and finite-time thermodynamic theory has been carried out for an irreversible Brayton refrigeration cycle, where multi-irreversibilities considered in the system include finite rate heat transfer, internal dissipation of the working fluid and heat leak between heat reservoirs.

TL;DR: In this article, a non-isothermal flow with convective heat transfer through a curved rectangular duct of aspect ratio 2 is numerically studied by use of the spectral method with a temperature difference between the vertical outer (heated) and inner (cooled) sidewalls.

TL;DR: In this article, a numerical investigation of convective heat transfer between a fluid and three physical obstacles (blocks) mounted on the lower wall (2 blocks) and on the upper wall (1 block) of a rectangular channel was conducted.

TL;DR: In this article, the effect on heat transfer rates, friction factor and exergy loss of swirl generators with holes for the entrance of fluid were investigated by placing them at the entrance section of inner pipe of heat exchanger.

TL;DR: In this paper, a computational model based on the SIMPLE algorithm is used for solving the mass, momentum, and energy transfer governing equations in air-filled, tilted square enclosures with two adjacent walls heated and two opposite walls cooled.