No abstract

No abstract

Award Number: 2/160/43The major purpose of this study is to observe the flow properties of an electrically conducting hybrid nanofluid (HNF) consist of carbon nanotubes (CNTs) and iron ferrite (Fe 3 O 4 ) nanoparticles (nps) passes through a linearly expanded sheet with the slip velocity. The non-Newtonian fluid models provide a better insight of the flow and heat allocation properties of nanofluids. For this purpose, we have used a Maxwell nanoliquid as the basis fluid in our experiment, with an inclined magnetic field applied to the flow direction. The flow regulating equations are turned into a system of non-dimensional differential equations via resemblance substitutions. The computational procedure "parametric continuation method" (PCM) has been used to compute the velocity, energy, and mass of the HNF. The statistical results are displayed through graphs and tables. Maxwell parameter, porosity, and velocity slip tend to minimize HNF velocity, while its temperature rises with the action of thermal radiation, inclined magnetic field, unsteadiness variable, and viscous dissipation. Furthermore, the porous medium's penetration has a greater influence on the reduction of nanofluid velocity.

The chemical reactions widely operate in industries to enhance the heat transfer rate among the chosen domain. In the current article, we are going to observe an exothermic reaction of calcium oxide and water in a backward step tubular reactor with a cooled surrounded surface. The tubular reactor will be considered axisymmetric with an aspect ratio of 0.5, 0.6, and 0.7 from half radius to the length of the reactor. The governing partial differential equations of mass, momentum, and energy and diffusion equations are solved using the commercial package of finite element method of COMSOL Multiphysics 5.6. A parametric study is done by using the Reynolds number in the range and activation energy E in a range from 71,000 J/mol to 75,000 J/mol. The initial concentration of calcium oxide is tested from 1% to 3%. The computational results will be displayed for the upstream and downstream of the channel. It was concluded that the temperature difference is increasing linearly against the concentration of calcium hydroxide upstream and nonfunctional downstream. The average Sherwood and Nusselt numbers give a positive response with increasing the aspect ratio as well as the Reynolds number. The rotation rate at the middle of the downstream was also concluded using the Reynolds number and aspect ratio.

In this paper, a convective fluid flow mixed with different nanoparticles (NPs) flowing on a vertical plate is studied. The impacts of slip boundary wall, Newtonian heating, and magnetic field are also pondered. Using Fourier’s rule of heat conductivity and Caputo-time (CT) fractional derivative (FD), the nondimensional governing equations for this mathematical model are obtained. The Laplace transformation (LT) technique is used to get a generalized solution to the equations of momentum and energy. The physical interpretation of velocity distribution in some particular cases is well recognized in the past research works and is also highlighted to scrutinize some further physical perception into the subject and to fortify the novelty of this research communication. Furthermore, graphical depictions are created using the mathematica program to assess the physical importance of the considered topic. As a result, we concluded that the blood-based aluminium oxide ([Formula: see text] NPs show more decaying behavior as compared to titanium dioxide ([Formula: see text] NPs for temperature and velocity profile. Moreover, changing the fractional parameter’s value for a long period of time improves thermal and velocity profiles.