Showing papers in "Experimental Thermal and Fluid Science in 2016"

TL;DR: In this article, the effects of temperature and nanoparticles concentration on the rheological behavior of Fe 3 O 4 -Ag/EG hybrid nanofluid have been experimentally investigated.

TL;DR: In this paper, the authors reviewed the work carried out by various researchers in the last two decades and summarized the preparation and analytical techniques used for preparation of stable nanofluids.

TL;DR: In this paper, the heat transfer and pressure drop characteristics of a hybrid nanofluid mixture containing alumina nanoparticles and multi-walled carbon nanotubes (MWCNTs) were experimentally investigated in a chevron corrugated-plate heat exchanger.

TL;DR: In this paper, the rheological behavior of COOH functionalized MWCNTs-SiO2/EG-water hybrid nano-coolant for application in cooling systems at temperatures ranging from 27.5°C to 50°C has been examined.

TL;DR: In this paper, the authors investigated the thermophysical properties of water-based nanofluids and showed an increase in electrical conductivity and viscosity with the addition of nanoparticles.

TL;DR: In this paper, the effect of solid volume fraction and Reynolds number on heat transfer coefficient and pressure drop of CuO-Water nanofluid was investigated in a double-tube counter flow heat exchanger under turbulent flow regime.

TL;DR: In this paper, the effect of Fe2O3/Kerosene nanofluid to the copper closed-loop oscillating heat pipe under the magnetic field for inclination angles ranging from 0° to 90°, under different heat inputs (10 − 90 W).

TL;DR: In this article, an experimental study on rheological behavior of hybrid nanofluids made of iron (Fe) and copper oxide (CuO) in a binary mixture of water and ethylene glycol was conducted.

TL;DR: In this paper, the performance of thermoelectric cooling of electronic devices with nanofluid in a multiport minichannel heat exchanger is experimentally investigated, and the result showed 40% enhancement in the coefficient of performance (COP) of the TEC module for 0.2% of nanoparticle volume concentration.

TL;DR: In this paper, an experimental investigation of heat transfer and friction of artificial roughness in the form of V-ribs with symmetrical gaps was investigated, which encompassed Reynolds number (Re) ranging from 4000 to 18,000, number of gaps (Ng) values of 1-5, relative gap width (g/e) values, relative roughness pitch (P/e), angle of attack (α) range of 30-75°, and relative Roughness height (e/D) value of 0.043.

TL;DR: In this paper, the effect of using TiO2-water nanofluid on heat transfer enhancement and pressure drop in a Brazed Plate Heat Exchanger used in domestic hot water system is investigated experimentally.

TL;DR: In this paper, a counter-current annular bubble column with 0.24 m inner diameter and two internal pipes was investigated, and the authors used a bubble image analysis method to study the bubble shape and orientation as a function of the superficial gas and liquid velocities.

TL;DR: In this paper, the effects of both constant and alternating magnetic fields on the laminar forced convective heat transfer of a hybrid nanofluid containing tetramethylammonium hydroxide (TMAH) coated Fe 3 O 4 nanoparticles and gum arabic (GA) coated carbon nanotubes (CNTs) flowing through a heated tube were investigated experimentally.

TL;DR: In this article, the authors investigated the gas-liquid two-phase flow patterns at the entry section and the impellers inside a three-stage rotodynamic multiphase pump designed by the authors.

TL;DR: In this article, the authors present the results of an experimental research on the heat transfer and pressure drop characteristics of multi-walled carbon nanotubes (MWCNT), aqueous nano-fluids inside a plate heat exchanger (PHE), with the consideration of fouling formation of CNTs.

TL;DR: In this paper, the heat transfer coefficient and pressure drop characteristics of carbon nanotube water-based nanofluids inside the double pipe heat exchanger were investigated, where the COOH functionalized multi-walled carbon Nanotubes (FCNTs as purchased) were experimentally measured using KD2 Decagon instrument at different mass concentrations and temperatures.

TL;DR: In this paper, the effect of pitch of the pillars and impact velocity on the impact dynamics of a microliter water droplet on a micropillared hydrophobic surface was studied qualitatively by high-speed photography and quantitatively by the temporal variation of wetted diameter and droplet height.

TL;DR: In this paper, an investigation is carried out to determine how air and water flow rates as well as the air inlet size (variable parameters) influence the size distribution of micro bubbles for a Venturi type bubble generator.

TL;DR: In this paper, the effects of inner surface roughness on the cavitation erosion characteristics of submerged cavitating jets were experimentally investigated for the first time with respect to aggressive erosion intensity and efficiency.

TL;DR: In this paper, the thermal performance of hybrid and single type nanofluid is investigated in a coiled heat exchanger at constant wall temperature and laminar flow operating conditions.

TL;DR: In this article, the effect of different weight concentration and temperatures on convective heat transfer was evaluated in a horizontal shell and tube heat exchanger under laminar, transient and turbulent flow with three different heat fluxes.

TL;DR: In this paper, the authors studied the terminal velocity of a single bubble in water and glycerol aqueous solution and found that the velocity increases with the bubble diameter and the trend of the bubble velocity does not show a scattered behavior.

TL;DR: The objectives of the current investigation are to present and analyze acoustic attenuation data for vertical, upward oil-continuous multiphase flows and to develop neural networks for flow pattern recognition and gas volume fraction measurement using the ultrasonic attenuationData as input.

TL;DR: In this paper, a detailed experimental investigation has been carried out to analyze the flow maldistribution in a microchannel heat sink by using deionized water as the coolant in an aluminum micro channel heat sink with 25 numbers of rectangular microchannels of hydraulic diameter 763mm, for Reynolds number range of 200-650.

TL;DR: In this article, the authors studied longitudinal pulsed detonation in a rotating detonation combustor (RDC) using hydrogen-air mixtures, by utilizing two air injection schemes having different inlet areas, and a convergent nozzle assembly with different spacers that affixes to the RDC exit.

TL;DR: In this paper, heat transfer and pressure loss in an air to water double pipe heat exchanger are experimentally investigated for different governing parameters such as Reynolds number, pitch ratio, and number of perforated hole.

TL;DR: In this article, the authors focused on the pool boiling heat transfer of aqueous alumina nano-fluids up to critical heat flux point on a circular surface at two mass concentrations of 0.1%, 0.3% and nanoparticle size of 20nm and 50nm.

TL;DR: In this paper, an experimental study on a rotating detonation engine model using hydrogen/air mixture as propellant was conducted to analyze the initiation characteristics of detonation wave, and three ignition methods, including the ordinary spark plug, high-energy spark plug and thermal-jet tube, were used in the tests.

TL;DR: In this paper, the influence of varying the first, middle and last injection pulse durations alone, in sequence, while maintaining all the other injection pulses durations equal has been studied, and a comparison of the results has been made with diesel injection in a single pulse at an injection timing of 100°CA before top dead centre (TDC) and also with the conventional compression ignition mode of operation under similar outputs.

TL;DR: In this article, the authors used nanoparticles with an average particle size of 50nm to prepare nanofluids with mass fractions at 0.1, 0.3, and 0.5%.