Abstract
This paper examines the two-dimensional laminar steady magnetohydrodynamic doublediffusive mixed convection in a curved enclosure filled with different types of nanofluids. The enclosure is differentially heated and concentrated, and the heat and mass source are embedded in a part of the left wall having temperature Th (>Tc) and concentration ch (>cc). The right vertical wall is allowed to move with constant velocity in a vertically upward direction to cause a shear-driven flow. The governing equations along with the boundary conditions are transformed into a nondimensional form and are written in stream function-velocity formulation, which is then solved numerically using the Bi-CGStab method. Based on the numerical results, the effects of the dominant parameters such as Richardson number (1 ≤ Ri ≤ 50), Hartmann number (0 ≤ Ha ≤ 60), solid volume fraction of nanoparticles (0.0 ≤ ϕ ≤ 0.02), location and length of the heat and mass source are examined. Results indicate that the augmentation of Richardson number, heat and mass source length and location cause heat and mass transfer to increase, while it decreases when Hartmann number and volume fraction of the nanoparticles increase. The total entropy generation rises by 1.32 times with the growing Richardson number, decreases by 1.21 times and 1.02 times with the rise in Hartmann number and nanoparticles volume fraction, respectively.
Highlights
In the engineering and industrial context, a wide range of investigations has been performed for natural convection using nanofluid media with various techniques to improve the thermal conductivity and enhance the heat transfer performance of the fluid within the enclosure
The present work investigated numerically MHD double-diffusive mixed convective heat and mass transfer and entropy generation in a curved enclosure filled with different types of nanofluids and subjected to discrete heating
The influence of various physical parameters such as Richardson number, Hartmann number, heat and mass source location and length, the volume fraction of nanoparticles are examined in terms of streamlines, isotherms, isoconcentrations, entropy generation, average Nusselt number, and average Sherwood number
Summary
In the engineering and industrial context, a wide range of investigations has been performed for natural convection using nanofluid media with various techniques to improve the thermal conductivity and enhance the heat transfer performance of the fluid within the enclosure. Numerous studies have been conducted on the heat transfer and flow inside an enclosure filled with nanofluid medium [3, 34]. Conjugate natural convection flow in a square cavity in presence of hybrid nanofluid is investigated by Ghalambaz et al [9] They stated that the heat transfer rate rises due to the rise in hybrid nanoparticles and thermal conductivity ratio. Natural convection of Ag-MgO hybrid/water nanofluid inside a porous enclosure by applying Darcy model is studied by Mehryan et al [23]. They concluded that the heat transport decreases due to the dispersion of hybrid nanoparticles in the base fluid. They found that the average Nusselt number augments as the nanoparticles volume fraction increase
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
