Showing papers in "International Journal of Heat and Mass Transfer in 2015"

TL;DR: In this paper, the effects of Brownian motion on the effective viscosity and thermal conductivity of nanofluid were investigated. And the results were presented graphically in terms of streamlines, isotherms and isokinetic energy.

TL;DR: In this article, a mathematical model is analyzed in order to study the natural convection boundary layer flow along an inverted cone, where the shape of nanosize particles on entropy generation with based fluid is considered.

TL;DR: In this paper, an FE model on Selective Laser Melting (SLM) fabrication process is presented, which considers powder-to-solid transition together with an effective method to achieve volume shrinkage and material removal.

TL;DR: Li et al. as mentioned in this paper presented a hybrid thermal lattice Boltzmann (LB) model to simulate thermal multiphase flows with phase change based on an improved pseudopotential LB approach.

TL;DR: In this article, the authors investigated flow and heat transfer of magnetohydrodynamic (MHD) pseudo-plastic nanofluid in a finite film over unsteady stretching surface with internal heating effects.

TL;DR: The thermal network approach is a robust engineering tool that is easy to implement and program, is user friendly, straightforward, computationally efficient, and serves as a baseline methodology to produce results of reasonable accuracy.

TL;DR: In this article, a fractal scaling law for length distribution of fractures and the relationship among the fractal dimension for fracture length distribution, fracture area porosity and the ratio of the maximum length to the minimum length of fractures are proposed.

TL;DR: In this article, the thermal conductivity of Al 2 O 3 -EG nanofluids has been examined using a KD2-Pro thermal analyzer and two new correlations with very high accuracy were suggested.

TL;DR: In this paper, the effects of shear flow and power law viscosity on the temperature field are taken into account according to a modified Fourier law, and approximate analytical solutions are obtained by the homotopy analysis method (HAM).

TL;DR: In this article, the effects of wave amplitude, wavelength, volumetric flow rate and volume fraction of different types of nanofluids on thermal resistance, pressure drop, and friction factor of a microchannel heat sink were investigated.

TL;DR: In this article, the effect of magnetic field on heat transfer of Al 2 O 3 -water nanofluid in a two-dimensional horizontal annulus was investigated using the lattice Boltzmann method.

TL;DR: In this paper, the authors studied the fluid flow and heat transfer in micro-channel heat sinks with different inlet/outlet locations (I, C and Z-type), header shapes (triangular, trapezoidal and rectangular) and microchannel cross-section shapes (the conventional rectangular microchannel, the microchannel with offset fan-shaped reentrant cavities and the micro channel with triangular reentrants cavities) were numerically studied with computational domain including the entire microchannel heat sink.

TL;DR: A topology optimization method for a coupled thermal–fluid problem based on the two- and three-dimensional steady-state Navier–Stokes and energy equations is presented and a Tikhonov-based regularization scheme enables qualitative control of the geometric complexity of the optimal configurations.

TL;DR: In this paper, a novel material with a thermal conductivity as high as ∼5000 W −m−m−1 K−1 was used as a filler for modified epoxy resins.

TL;DR: An experimental investigation of pool boiling heat transfer on multiscale (micro/nano) functionalized metallic surfaces found that the enhancement of the critical heat flux was directly related to the wetting and wicking ability of the surface which acts to replenish the evaporating liquid and delaycritical heat flux.

TL;DR: In this article, an enhanced microchannel heat sink with sectional oblique fin is used to modulate the flow in contrast to continuous straight fin, which resulted in better heat transfer and a comparable pressure drop.

TL;DR: In this article, the effects of wettability on saturated pool boiling heat transfer from a smooth superheated substrate, with a finite thickness at constant wall temperatures at the bottom, are investigated based on a recently developed liquid-vapor phase-change lattice Boltzmann method.

TL;DR: In this article, three surfaces were fabricated with sintered porous coatings on: (i) entire microchannel surface (sintered-throughout), (ii) only the fin-tops, and (iii) only channel walls, and their performance with degassed water at atmospheric pressure was experimentally obtained.

TL;DR: In this paper, a transient mathematical model was established to examine the influences of varying porosity on the thermal characteristic, considering natural convection and Brinkman-Forchheimer extension to the Darcy law.

TL;DR: In this article, a model of wall-induced fluid flow within an infinite tapered channel has been developed to simulate the transport phenomena due to asymmetric wall displacements, and the analytical solution has been obtained for the temperature and concentration of the nanofluid.

TL;DR: In this paper, a stable-state natural convection heat transfer in a three-dimensional porous enclosure filled with a nanofluid using the mathematical nano-fluid model proposed by Buongiorno is presented.

TL;DR: In this article, the authors studied the smoke behaviors induced by fires in inclined tunnels with different slopes and the upstream maximum temperatures along the tunnel centerline were specifically focused, showing that the longitudinal centerline peak temperature occurs at the downstream region of fire source rather than right above the fire source.

TL;DR: In this article, the performance of microstructured surfaces in enhancing boiling heat transfer (BHT) and critical heat flux (CHF) was investigated with a set of experiments with thirteen prepared samples: twelve with a micro-structured surface, and one with a bare surface.

TL;DR: In this paper, the maximum droplet radius and droplet size distribution adjustment with hydrophobic-hydrophilic hybrid surface, and the resultant heat transfer performance are investigated experimentally.

TL;DR: In this paper, the melting process of phase change material (PCM) infiltrated in a finned metal foam was numerically investigated using two approaches: (a) pore-scale and (b) volume-averaged numerical simulations.

TL;DR: The impact morphology of millimetric water drops on a polished aluminium surface has been studied experimentally by high-speed imaging, for surface temperatures between 50 and 400°C, and Weber numbers up to 160 as discussed by the authors.

TL;DR: In this article, an ensemble of 4000 spherical nanoparticles with the material properties of CNT, aluminum, aluminum oxide, copper and gold was simulated in four base liquids and the ensemble-averaged results generated the thermophoretic velocity of these particles in the base liquids.

TL;DR: In this article, a set of similarity transformations are introduced to convert the boundary layer equations into self-similar forms, and the solutions have been obtained numerically through shooting method with fourth-fifth-order Runge-Kutta integration technique.

TL;DR: In this paper, a review of the literature concerning two-phase flow and heat transfer in reduced gravity is presented, where different methods and platforms dedicated to exploring the influence of reduced gravity, including ground flow boiling experiments performed at different orientations relative to Earth gravity.

TL;DR: In this paper, a highly instrumented condensation module is used to map detailed axial variations of both wall heat flux and wall temperature, which are used to determine axial variation of the condensation heat transfer coefficient.