A novel coupling of (CNT-Fe3O4/H2O) hybrid nanofluid for improvements in heat transfer for flow in an asymmetric channel with dilating/squeezing walls. (June 2019)

• Record Type: Journal Article
• Authors: Saba, Fitnat; Ahmed, Naveed; Khan, Umar; Mohyud-Din, Syed Tauseef
• Is Part Of: International journal of heat and mass transfer. Volume 136(2019)
• Page Start: 186
• Page End: 195
• Publication Date: 2019-06
• Subjects: (CNT-Fe3O4/H2O) hybrid nanofluid -- Numerical outcomes -- Dilating/contracting permeable walls -- Heat transfer -- SWCNTs/MWCNTs; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2019.02.097
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: A critical analysis for the flow of hybrid nanofluids is presented. A novel model for the flow of CNT - Fe 3 O 4 / H 2 O nanofluid has been considered. Numerical simulations have been carried out for the analysis. Graphical illustrations are used to analyze the flow behavior under varying conditions. Abstract: Hybrid nanofluid is an advanced version of a nanofluid, which significantly boosts the heat transport mechanisms. Therefore, this can be considered a new alternative source to the traditional ways (involving certain fluids or nanofluids) of heating or cooling. The main concern of this manuscript is to scrutinize the flow field and heat transfer phenomena, for the flow of a hybrid ( C N T - Fe 3 O 4 / H 2 O ) nanofluid, inside an asymmetric long channel, whose porous walls exhibit embracing or parting motion. The equations, corresponding to the mass, momentum and energy conservations, have been modeled accordingly and after this, by making use of similarity transformations, a relevant set of nonlinear ordinary differential equations have been successfully achieved. In order to devise a numerical solution of the consequent equations, shooting method coupled with Runge–Kutta–Fehlberg algorithm have been employed. Furthermore, a graphical aid, to interpret the influential behaviors of various emerging entities on the velocity and temperature distributions, have also been provided. The dispersion of C N T s in ( Fe 3 O 4 / H 2 O ) nanofluid, have a considerable impact on the flow, temperature and heat transport properties, and these variations can be clearly visible at the both walls. Moreover, it has been observed that the SWCNTs, in most of the cases, seem to have a greater impact on the temperature profile as well as on the heat transport phenomenon.