In this work, the linear and weakly nonlinear stability inspections on thermal convection of hybrid nanomaterial in a porous medium are made using modified Buongiorno two-phase Darcy model. Analytical expression for critical nanofluid dimensionless number onset convective motion is obtained theory. current situation investigation, transient heat transport arrangement form Nu numerically R-K45 p...

In the present research mixed convection flow through a copper-water nanofluid in a driven cavity in the presence of magnetic field is investigated numerically. The cavity is heated from top and cooled from bottom while its two vertical walls are insulated. The governing equations including continuity, N-S and energy equations are solved over a staggered grid system. The study is conducted for ...

This paper reports experimental investigations on the droplet formation of deionized water and a nanofluid in a heat-induced microfluidic flow focusing device. Besides the effect of temperature, the effects of nanoparticle suspension (nanofluid), and the flow rate of aqueous fluid on the droplet formation and size manipulation were studied. At constant flow rates of the two liquids, three diffe...

Interfacial tension and viscosity of a liquid play an important role in microfluidic systems. In this study, temperature dependence of surface tension, interfacial tension and viscosity of a nanofluid are investigated for its applicability in droplet-based microfluidics. Experimental results show that nanofluid having TiO2 nanoparticles of 15 nm diameters in deionized water exhibit substantiall...

Due to rapid industrialization and urbanization, upward rise in carbon emissions the atmosphere, depletion of fossil fuel gas reserves have forced find alternative renewable energy resources, where solar is one most promising source. Parabolic trough collectors (PTCs) can effectively transfer high temperature tube receiver upto 400 °C. In this study, Computational Fluid Dynamics (CFD) analysis ...

An analysis is carried out to study the steady two-dimensional stagnation-point flow of a nanofluid over a stretching/shrinking sheet in its own plane. The stretching/shrinking velocity and the ambient fluid velocity are assumed to vary linearly with the distance from the stagnation point. The similarity equations are solved numerically for three types of nanoparticles, namely copper, alumina, ...

The present study investigates the unsteady, two dimensional, laminar flow of a nanofluid over a stretching sheet with thermal dispersion in the presence of MHD and variable suction is studied. Two water based nanofluids containing Copper Cu, Titanium dioxide TiO2 nanoparticles are considered in this study. Using the similarity transformations, the governing equations have been transformed into...

Dynamic viscosity values for three particular water-based nanofluids have been experimental determined using a commercial ‘piston-type’ viscometer. Viscosity data, expressed as a function of temperature and particle volume fraction, are presented for 29nm particle-size CuO-water and Al2O3-water with 36nm and 47nm particle-sizes, temperatures up to 75°C and particle volume fraction up to 9%. In ...

A coupled molecular dynamics (MD)-stochastic model has been developed for predicting the thermal conductivity of a hypothetical water based Zn-nanofluid taking into account the heat transfer during and after collision of the nanoparticles with the heat source. The model has predicted a somewhat lower enhancement in thermal conductivity of water based Zn-nanofluid compared to water based Cu-nano...

An overview of systematic studies that address the complexity of nanofluid systems and advance the understanding of nanoscale contributions to viscosity, thermal conductivity, and cooling efficiency of nanofluids is presented. A nanoparticle suspension is considered as a three-phase system including the solid phase (nanoparticles), the liquid phase (fluid media), and the interfacial phase, whic...