Abstract In this paper, convective heat transfer of Fe 3 O 4 –carbon nanotubes (CNTs) hybrid nanofluid was studied in a horizontal small circular tube under influence annular magnets. The pipe has an inner diameter mm and length 1.2 m. Heat characteristics the –water were examined for many parameters, such as nanoparticle volume fraction range 0.4–1.2% Reynolds number 476–996. order to increase...

This paper presents numerical simulations for a MHD convective process in curved channels. The worked suspension consists of water as based hybrid nanofluid and two types the nanoparticles, namely, Cu Al2O3. Two systems governing equations are formulated dusty phases. system is modeled view lubrication approach. mapped to regular computational domain then they solved numerically using fourth or...

In recent decade, the new advanced nanofluids, composed from various particles, have attracted the attention of researchers. This class of nanofluids, which can be prepared by suspending several types (two or more than two) of nanoparticles in base fluid, is termed as hybrid nanofluids. In this work, an experimental investigation on the effects of temperature and concentration of nanoparticles ...

This study investigates a hybrid nanofluid flow towards stagnation region of vertical plate with radiation effects. The consists copper (Cu) and alumina (Al2O3) nanoparticles which are added into water to form Cu-Al2O3/water nanofluid. point describes the fluid motion in solid surface. In this study, both buoyancy assisting opposing flows considered. similarity equations obtained using transfor...

The steady two-dimensional flow and heat transfer over a stretching/shrinking sheet in a nanofluid is investigated using Buongiorno's nanofluid model. Different from the previously published papers, in the present study we consider the case when the nanofluid particle fraction on the boundary is passively rather than actively controlled, which make the model more physically realistic. The gover...

This paper presents a linear stability analysis of natural convection in a horizontal layer of a viscoelastic nanofluid. The Oldroyd B model was utilized to describe the rheological behavior of a viscoelastic nanofluid. The model used for the nanofluid incorporated the effects of Brownian motion and thermophoresis. The onset criterion for stationary and oscillatory convection was derived analyt...

One of the preconditions of biomedical use of iron oxide nanoparticles including magnetite is their stabilization in liquid medium, wherein the covering substances largely determine pharmacological activity and toxicity of such nanoparticles. we obtained nanofluid that contains magnetite nanoparticles stabilized with 2-ethyl-6-methyl-3-hydroxypyridine succinate (Mexidol) and polyvinyl pyrrolido...