High-performance and small-sized heat exchangers have been demanded due to the miniaturization higher output of electronic devices, lasers, energy harvesting/storage systems. Graphene nanosheet suspension has attracted attention as a next-generation nanofluid because its high thermal conductivity low pressure drop, while being dispersed stably without any additives. Graphene-based nanofluids mostly investigated using graphene oxide, there are few studies on pure limitation in mass production...

In this work, an experimental investigation of a mini-heat transport device incorporating thermosensitive magnetic fluid was performed. The parameters measured were the force, position magnet, and temperature fluid. It found that velocity could be controlled by varying force magnet. Furthermore, maximum produced without using pump about 20 mm/s.

This paper discusses a pulsating heat pipe (PHP) using self-rewetting fluid. Unlike other common liquids, fluids have the property that surface tension increases with temperature. The increasing at higher temperature can cause liquid to be drawn toward heated if dry spot appears and thus improve boiling transfer. In experiments, 1-butanol 1-pentanol were added water concentration of less than 1 wt % make A made from an extruded multiport tube was partially filled fluid mixture tested for its...

Abstract An experimental study was carried out to investigate the freezing characteristics of supercooled water droplets impacting on solid surfaces. Each droplet inside surface a waterrepellent guideway in cooled air environment and then blasted horizontally by jet pressurized impact vertical test block. The deformation were observed using high-speed camera. frozen under varying conditions temperature, velocity volume. results indicated that behavior strongly affected condition surface....

Background: Venous drainage in cardiopulmonary bypass is a very important factor for safe cardiac surgery. However, the ideal shape of venous cannula has not been determined. In present study, we evaluated effect side-hole number under fixed total area and flow to elucidate increasing numbers. Method: Computed simulation was performed. Cannulas were divided into six models: an end-hole model (EH) models containing four (4SH), (6SH), eight (8SH), 10 (10SH) or 12 side-holes (12SH). Total...

In the present study, flow characteristics and heat transfer of a thermo-sensitive magnetic fluid, which is multiphase-flow material, were investigated experimentally. The mini-channels considered herein have depth 0.5 mm, with nominal channel width being equal to five times depth. device was constructed from Teflon tube. operation based on thermo-magnetic suspension Mn-Zn ferrite particles in kerosene, magnetization known decrease increasing temperature. experimental parameters force,...

Pharyngeal cooling decreases brain temperature by carotid arteries. This study was designed to evaluate the principle of pharyngeal in monkeys and humans.Monkeys (n = 10) were resuscitated following 12 min cardiac arrest. 5), which cold saline (5°C) perfused into cuff at rate 500 ml/min, initiated simultaneously with onset resuscitation for 30 min. Patients 3) who an intensive care unit subjected under propofol anesthesia.In animal study, core significantly decreased compared that control...

We report a facile method for preparing silica (SiO2)-based material containing Sn nanoparticles (NPs) distributed inside enhancing the thermal cyclic stability of inserted NPs. Absorption precursor (i.e., an aqueous SnCl2 solution) into mesoporous SiO2 matrix resulted in confinement matrix. Hydrogen reduction above composite yielded with diameter ca. 30 nm uniformly porous (p-SiO2) spheres: NPs@p-SiO2. Our investigation transformation structure to hold NPs revealed that process was closely...

Pulsating heat pipes (PHPs) are a new type of efficient transfer for small devices, which were introduced in the mid-1990s by H. Akachi. PHPs can be used to cool electronics eliminating high flux. In this study, flow visualization was conducted an open-loop PHP using high-speed camera. The composed glass tube with internal diameter 1.8 mm, heated electric heater and cooled water at constant temperature. evaporator had 10 rotations 20 channels. working fluid employed comprised self-rewetting...

In order to elucidate the cooling characteristics and improve performance of a room temperature magnetic refrigerator using air as heat transfer fluid, experimental analytical study concerned with an active regenerator (AMR) are conducted. The basic components target system circuit, test section, fluid supplying associated instrumentation. Spherical gadolinium particles packed in section working substance. Temperature profiles under several operating conditions for Air-AMR measured...

There has been no study for measuring the comprehensive flow field of magnetic fluids. A pumpless transport system envisaged based on temperature dependence magnetization fluid; however, knowledge regarding internal is still limited. It difficult to optimize design and realize practical use using fluid. Therefore, in this study, first time, a two-dimensional was visualized by encapsulating material microcapsule labeling it with fluorescence. The measured high accuracy fluorescent capsule,...

Recently, electronics thermal management faces problems in the wake of component miniaturization, which has led to higher demands on heat flux dissipation. Pulsating pipe (PHP) can be used for cooling devices because its potential removing high flux. It is well known that various parameters affect performance pulsating pipe. Therefore, many researchers have done research improvement performance. This paper presents transfer characteristics open-loop (OLPHP) using a self-rewetting fluid as...

New experimental results have been obtained on the enhancement of heat transport by a pulsating pipe (PHP) using self-rewetting fluid. Self-rewetting fluids property that surface tension increases with temperature unlike other common liquids. The increasing at higher could cause liquid to be drawn towards heated if dry spot appears, and improving boiling transfer. In present experiments, 1-butanol was added water concentration less than 1 wt% make A made from an extruded multi-port tube...

Ice slurry has attracted a great deal of attention as coolant for direct contact cooling. In this study, we generated ice by the method pressure shift freezing (PSF), which is based on freezing-point depression an aqueous solution at high-pressure conditions. As result, basic characteristics generation are clarified. Moreover, physical properties indicate that shape particle in strongly affected both supercooling degree and concentration.

This paper discusses a pulsating heat pipe (PHP) using self-rewetting fluid. Unlike other common liquids, fluids have the property that surface tension increases with temperature. The increasing at higher temperature can cause liquid to be drawn towards heated if dry spot appears, and thus improve boiling transfer. In experiments, 1-butanol 1-pentanol were added water concentration of less than 1 wt% make A made from an extruded multi-port tube was partially filled fluid mixture tested for...