Squeezing motion of radiative magnetized ternary hybrid nanofluid containing graphene-graphene oxide-silver nanocomposite in water base fluid placed between two parallel plates

Abstract

The present article explores flow of ternary hybrid nanofluid (THN) between two parallel plates in which upper one is in squeezing motion. The study of squeezing flow has its importance in industrial applications, like the flow between pistons and nozzles in the engine of vehicles. THN (graphene-graphene oxide-silver/water) is used to improve the efficiency of heat carrier fluid by the synergetic effects of nanoparticles. Magnetic field and thermal radiation effects are also included in the problem. Governing mathematical form of the problem is constructed by using a modified Buongiorno nanofluid model. Dimensionless system of ODEs reduced from PDEs through transformations and further simplified towards the solution with the numerical approach ‘bvp4c’, a MATLAB based solver. The reliability of the outcomes is confirmed by matching them with the previously published works. The findings reveal that the nanofluid velocity reduces with squeezing and magnetic parameters in the mid-section between the plates and its temperature can be controlled by the amount of nanoparticles dispersed into it, Prandtl number and the radiation effect. Overshoot in the concentration is attained for higher temperature gradient forces. Also, local Nusselt and local Sherwood numbers show contrasting trends for the upper and lower plates with the types of nanofluid (ternary/binary/unary), Prandtl number and radiation effect, but remain stationary with compression and magnetic effect. That means better transfer characteristics are found for ternary nanofluid, radiation and magnetic effects for the lower plate, but drag also intensifies; so suitable choices are considered for practical purposes. By the comparative analysis, it can be concluded that the performance of ternary hybrid nanofluid is relatively more efficient than binary and unary for heat transfer applications.

Keywords

• Squeezing motion
• Ternary hybrid nanofluid
• Modified buongiorno model
• MHD
• Thermal radiation