نتایج جستجو برای: sio2water nanofluid

تعداد نتایج: 4439  

Journal: :energy equipment and systems 0
ali reza yousefnejad department of mechanical engineering, najafabad branch, islamic azad university, najafabad, iran mohammad mahdi heyhat faculty of mechanical engineering, tarbiat modares university, tehran, iran amir homayoun meghdadi department of mechanical engineering, najafabad branch, islamic azad university, najafabad, iran

the present study investigated the effect of distilled-water/ silver nanofluid on heat transfer in a closed cooling system of one of the electrical energy generation units at isfahan power plant. the difference between this study and previous researches refers to silver properties which have a high thermal conductivity and is non-toxic, hydrophilic and eco-friendly. distilled water/ silver nano...

Journal: :international journal of nano dimension 0
a. l. subramaniyan department of physics, thiagarajar college of engineering, madurai-625015, india. r. ilangovan department of nanoscience and nanotechnology, alagappa university, karaikudi-630003, inida.

the term nanofluids was first coined by sir stephen choi in 1995 at argonne national laboratory ,u.s.a .since the discovery, nanofluid have been explored as heat transfer fluids. nanofluids increased the thermal conductivity of existing coolants (water, ethylene glycol) by a magnitude of hundred times which made them attractive for miniaturization of electronic devices .from 1995 till 2008 nano...

Journal: :international journal of advanced design and manufacturing technology 0
mohamad najafi department of mechanical and aerospace engineering, science and research branch, islamic azad university, tehran, iran *corresponding author

the aim of this manuscript is to study the implication of aluminium-oxide nanofluid for an amphibious vehicle engine (viable on land and under water) cooling system both analytically and experimentally. to achieve this, a one-dimensional model of the engine cooling system (radiator) is considered through a computational fluid code in which the mass flow rate for a range of the coolant temperatu...

The abrasion is a significant issue, especially in machining of rigid steels. A functional and suitable approach for enhancing the heat transfer from machining area is using an intermediate fluid with higher heat transfer potential instead of common fluids. The objective of this experimental study is to discuss production, stability and thermal conductivity examination of water/graphene oxide n...

Journal: :Diamond and Related Materials 2022

Carbon nanomaterials are of great interest for next generation nanofluids. nanotubes and graphene are, in particular, highly thermally conductive their use as thermal fluid is gaining momentum among the research community. This work investigates performance nanoplatelet (GnP)-nanofluid multi-walled carbon nanotube (MWCNT)-nanofluid by using a concentric pipe heat exchanger. The prepared nanoflu...

2014
Mohammad Mehdi Keshtkar Neda Esmaili Mohammad Reza Ghazanfari

The effect of heat source/sink on steady two-dimensional laminar MHD mixed convection boundary layer flow past a vertical permeable surface embedded in a porous medium saturated by a nanofluid is performed in this study. Numerical solutions of the similarity equations are obtained using the shooting method. Three types of metallic or nonmetallic nanoparticles, namely Copper (Cu), Alumina (Al2O3...

2016
M. Yogeswaran K. Kadirgama M. M. Rahman R. Devarajan

Surface roughness is a variable often used to describe the quality of ground surfaces as well as to evaluate the competitiveness of the overall grinding system. The subject of this paper is a grinding process performed on P20 tool steel by changing the grinding conditions, including the depth of cut, the grinding passes, the type of wheel, and the cutting fluid supply in the experiment. The mai...

2015
H. Bayat M. Majidi M. Bolhasani A. Karbalaie Alilou A. Mirabdolah Lavasani

Unsteady flow and heat transfer from a circular cylinder in cross-flow is studied numerically. The governing equations are solved by using finite volume method. Reynolds number varies in range of 50 to 200; in this range flow is considered to be laminar and unsteady. Al2O3 nanoparticle with volume fraction in range of 5% to 20% is added to pure water. Effects of adding nanoparticle to pure wate...

2009
N Masoumi

In this paper a new equation for calculating the nanofluid viscosity by considering the Brownian motion of nanoparticles is introduced. The relative velocity between the base fluid and nanoparticles has been taken into account. This equation presents the nanofluid viscosity as a function of the temperature, the mean nanoparticle diameter, the nanoparticle volume fraction, the nanoparticle densi...

2016
Mihail Vladkov J.-L. Barrat Jean-Louis Barrat

Molecular dynamics simulations are used to model the thermal properties of a fluid containing solid nanoparticles (nanofluid). The flexibility of molecular simulation allows us to consider the effects of particle mass, particle-particle and particle-fluid interaction and that of the spatial distribution of the particles on the thermal conductivity. We show that the heat conductivity of a well d...

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