We investigate entropy generation in unsteady three-dimensional axisymmetric MHD nanofluid flow over a non-linearly stretching sheet. The flow is subject to thermal radiation and a chemical reaction. The conservation equations were solved using the spectral quasi-linearization method. The novelty of the work is in the study of entropy generation in three-dimensional axisymmetric MHD nanofluid a...

The thermal conductivity of superconducting MgB 2 was studied in both the superconducting and normal state region. The latter is almost equally determined by the electronic-and the lattice thermal conductivity. In the superconducting state, however, the lattice thermal conductivity is larger. The electronic thermal conductivity below T c was derived from the experimental data considering the Ba...

natural convection heat transfer has many applications in different fields of industry; such as cooling industries, electronic transformer devices and ventilation equipment; due to simple process, economic advantage, low noise and renewed retrieval. recently, heat transfer of nanofluids have been considered because of higher thermal conductivity coefficient compared with those of ordinary fluid...

Different kinds of nanofluids show peculiar characteristics. In this work, a mixed nanofluid consisting of single-wall carbon nanohorns and silver nanoparticles aqueous suspensions is prepared and optically characterized, in the perspective to merge the favorable optical characteristics of carbon nanohorn-based nanofluids to the good thermal properties of silver-nanofluids. For the samples, bot...

This study examines the influence of radial thickness on the thermal conductivity of thin metallic wires. While size effects on the electrical conductivity of thin wires have been discussed in the literature, research into size effects on thermal conductivity still requires investigation. At such small length scales, the assumption that the reduced electrical conductivity can be simply related ...

one of the effective methods to improve the thermal efficiency of solar collectors is using nanofluids as the coolant. the present study experimentally investigated the effect of sio2/water nanofluid with 1% mass fraction on the performance of a symmetric collector, i.e. conical solar collector. the conical solar collector with 1 m2 area and normal to the earth was tested in ahvaz, a city in th...

 Nanofluids are colloidal suspension of nanoparticles in a base fluid and have superior thermal properties in comparison to their base fluids. Novel properties of nanofluids are yet to be explored to the highest potential. Currently extensive investigation has been done on thermal conductivity of metallic and oxide...

It is well known that solar energy the main source of thermal coming from sun responsible for huge operations in engineering studies. can be seen technology photovoltaic cells, streetlights, plates, and water pumping. This study investigating radiation as a method to improve performance pump (SWP) with use along nanotechnology. The transfer checked case many impacts including heat radiations va...

Hybrid nanofluid is the extension from that had been recently discovered, which can enhance heat transfer performance of application. However, there were limited reviews done on effect surfactant thermal conductivity and mixing ratio hybrid nanofluid. These are critical to giving a detailed insight into factors affect enhancement Furthermore, recent review in application update any new findings...

This study explores the growth of heat transfer rate for hybrid nanofluid-flow through two rotary plates fixed parallel. For improvement thermal conductivity nanoparticles Cu and graphene oxide have dispersed in water. The fluid-flow has been influenced by radiation. Magnetic effects with strength, B0, employed normal direction plates. set equations that controlled system shifted to dimension-f...