Showing papers in "Experimental Thermal and Fluid Science in 2018"

TL;DR: In this paper, the melting process of phase change materials (PCMs) in side-heated enclosures with different numbers of fins was evaluated for inclination angles of 90° (vertical), 45° and 0° (horizontal).

TL;DR: In this paper, the performance of a copper-made heat sink with rectangular microchannel was evaluated under laminar flow regime, where silver nanoparticles were synthesized and dispersed into the deionized water as a potential coolant.

TL;DR: In this article, the authors summarized the research outcomes of various experimental and numerical studies, and provided an overview of heat transfer mechanisms responsible for the change in thermal performance of heat pipes.

TL;DR: In this article, the authors argue that there is a considerable overlap in the physics behind the reported rotating detonations in hollow combustors and the high frequency tangential combustion instabilities that are known to wreak havoc on engines.

TL;DR: In this article, the orientation effects during inclined downward flame spread processes were thoroughly investigated by experimental and theoretical methods, and the mechanism of orientation effect during the flame spread process was qualitatively analyzed in detail, and simplified expressions of flame spread rate of the two insulation materials with different orientations were deduced.

TL;DR: In this paper, the authors examined heat transfer using three different non-Newtonian nanofluids comprising of Fe 2 O 3, Al 2O 3 and CuO nanoparticles in aqueous carboxymethyl cellulose (CMC) base fluid.

TL;DR: In this article, the authors investigated the dynamic characteristics of water injection and gas scavenging in coal seams and found that a hydraulic gradient within coal seams is the major driving source for water injection.

TL;DR: In this paper, the authors present an experimental methodology that enables accurate measurement of fundamental subcooled flow boiling quantities, such as nucleation site density, bubble growth and wait time, and bubble departure diameter, up to the Critical Heat Flux (CHF) limit.

TL;DR: In this article, the performance of a cylindrical heat pipe under various operating conditions was experimentally analyzed and the effect of the working fluid fill volume, inclination angle, and heat input on the equivalent thermal resistance of the heat pipe was investigated.

TL;DR: In this article, the effects of adding aluminum oxide (Al2O3) nanoparticles into Diesterol blended fuel (70% diesel+ 20% ethanol+ 10% Jojoba biodiesel) on the performance, combustion and emission characteristics of a diesel engine were experimentally investigated.

TL;DR: In this paper, the physical mechanisms behind the generation of heat associated to the DBD plasma actuators operation were described and discussed with the purpose of a better understanding of the heat generation mechanisms behind operation of DBD plasminar actuators.

TL;DR: In this paper, the authors examined the heat transfer enhancement of MWCNT-water nanofluid in a double pipe heat exchanger due to vibrating walls for different mass fractions.

TL;DR: In this paper, the particle image velocimetry (PIV) measuring technique was used to measure the complex flow structures in a low specific speed centrifugal pump, and three typical interacting modes were observed at different flow rates, and the cutting effect of the volute tongue on the vorticity sheet is dependent strongly on the local absolute velocity distribution.

TL;DR: In this paper, the dynamics of back-layering flow induced by a continuous buoyant release in a naturally ventilated inclined tunnel were investigated using brine water experiments, showing that the back-layer length is independent of buoyancy flux of the releasing source.

TL;DR: In this article, the Lucas-Kanade method and the Farneback method were applied to high-velocity air-water skimming flows above a stepped chute.

TL;DR: In this article, the authors used a high speed video camera and a microphone respectively to examine unsteady combustion in a rapidly mixed tubular flame burner with varying oxygen content. But the results showed that the flame became steady, and thereafter evolved into a steely state in the rich condition.

TL;DR: In this paper, the cavitation bubble is generated by a focused laser beam with the bubble size adjusted through energy dissipater, and a series of experimental work is conducted with variations of the bubble sizes, the particle sizes and the distance between the bubble and the particle.

TL;DR: In this paper, the macroscopic laws of convective flows forming in evaporating water droplets exposed to high-temperature (up to 500°C) heating in a gas environment were investigated.

TL;DR: In this paper, the micro-pin-finned area and the smooth area are fractally distributed on the heating surface by micromaching (dry etching) method, and the results indicate that the bistructured surfaces can efficiently enhance the heat transfer performance in the nucleate boiling region and the critical heat flux (CHF) is also significantly improved.

TL;DR: In this article, an experimental investigation was carried out to study the effect of refrigerant mass flux, local vapour quality, coolant flow rate and inlet coolant temperature on the local condensation heat transfer coefficient.

TL;DR: In this paper, the effects of the fuel temperature on diesel nozzle internal flow and subsequent atomization were analyzed experimentally using a 10-times scaled-up transparent acrylic model nozzle with different geometries.

TL;DR: In this paper, heat transfer, temperature and velocity fields of droplets of water and aqueous salt solutions have been studied, and it is shown that the heat flux q for a water droplet is several times higher than for salt solutions.

TL;DR: In this article, an experimental investigation was performed to study the condensation induced water hammer (CIWH) phenomenon caused by steam-water direct contact condensation in a horizontal pipe.

TL;DR: In this paper, the effects of applying magnetic field on hydrodynamics and heat transfer of Fe3O4/water magnetic nanofluid flowing inside a vertical tube have been studied experimentally.

TL;DR: In this article, matched-index-of-refraction (MIR) and stereoscopic particle image velocimetry (SPIV) measurements were performed on a cross-flow plane at Reynolds numbers of 500, 2500, and 6300, and the measurement area covered the interior and edge sub-channels that were located near the enclosure wall.

TL;DR: In this paper, a PECVD technique was used to grow both the few layer Graphene (FLG) as well as carbon nanotubes (CNT) over the copper substrate, using FC-72 as working fluid.

TL;DR: In this paper, the authors investigated the effect of buoyancy on heat transfer of supercritical CO2 in a horizontal tube and found that buoyancy and bulk flow acceleration are major reasons for such a difference.

TL;DR: In this article, the authors report on experimental study of flow and pressure pulsations in draft-tube of a laboratory air model of Francis-99 hydro-turbine operating over a broad range of regimes employing a rapid prototyping of the swirl generators and computerized measurements.

TL;DR: In this article, the effects of geometrical parameters on the hydraulic and thermal performance of a single pass U-type plate heat exchanger for the range of Reynolds number 800-2300 were experimentally investigated.

TL;DR: In this paper, the spray performance of airblast atomizer is experimentally investigated under different operating conditions and different internal atomizer geometry, and the results indicate that the spray cone angle increases with increasing the atomizing air to fuel mass ratio and also by increasing the air swirler angle while it decreases by increasing distance between the fuel nozzle exit and the atomising air exit orifice ratio of zero.