The paper aims to analyze the effects of various Prandtl number and different nanoparticles for heat transfer entropy generation free convection laminar fluid flow in an L-shaped cavity filled by nanofluid. To investigate second law characteristics convective from L- shaped geometry water nanofluids (Cu-water, Ag-water, Al2O3-water), on average Nusselt number, total Bejan has been numerically a...

This work presents the effect of nanoparticles (Al2O3 and TiO2) on methyl ester synthesized from palm kernel oil for oil-filled power equipment. It investigates loss tangent, AC conductivity, breakdown strength ester-based nanofluid. The surface was functionalized with oleic acid before dispersing it into to modify stability mixture. Scanning electron microscopy coupled dispersive X-ray done tw...

The tribological properties of Lithium grease specimens with different concentrations Al2O3 nanoparticles were investigated using a pin on disc apparatus under sliding speeds and normal loads. Results showed that enhanced the lithium reduced COF wear scar width by approximately 57.9% 47.5% respectively.

the present work is an experimental study of steady state convective heat transfer of de-ionized water with a (0.04% by volume) volume fraction of al2o3 nanoparticles dispersed to form a nanofluid that flows through an aluminium tube.laminar fully developed flow heat transfer coefficient of al2o3 nanoparticles are dispersed in water in circular tube is discussed in this paper. in order to valid...

Experiments were performed to explore the micro-channel cooling benefits of water-based nanofluids containing small concentrations of Al2O3. The high thermal conductivity of nanoparticles is shown to enhance the single-phase heat transfer coefficient, especially for laminar flow. Higher heat transfer coefficients were achieved mostly in the entrance region of micro-channels. However, the enhanc...

Frequency control of plasmon resonances is important for optical sensing applications such as Surface Enhanced Raman Spectroscopy. Prior studies that investigated substrate-based control of noble metal nanoparticle plasmon resonances mostly relied on metal substrates with organic or oxide spacer layers that provided a fixed resonance frequency after particle deposition. Here we present a new ap...

In this paper, a review of the impact of most common nanoparticles on the Leidenfrost temperature TLeid in heat transfer applications is delivered. Moreover, a simple economic analysis of the nanoparticles use is proposed. When coolant is distilled water, TLeid can range 150-220 °C; occasionally, it can even amount to over 400 °C. When the base liquid is modified by additives, considerable chan...