Abstract
The purpose of utilizing hybrid nanofluids is to improve the heat transfer rate of the base fluid. An electromagnetically conducting flow of zinc-oxide and multiwalled carbon nanotubes suspension submerged in engine oil is explored on a biaxially, planarly, and perpendicularly stretching/shrinking surface. Dual solutions, as well as linear stability of the considered problem are studied. The energy transport analysis includes the impact of thermal radiation, heat source/sink, and Ohmic heating. In addition, similarity ansatzes are used to develop ordinary differential equations. Bvp4c technique in Matlab is applied to find the numerical solutions. It is perceived that the magnetic field's motional electromagnetic force drives the system's energy transfer rate to rise, while velocities drop causing an increment in skin friction. Moreover, the stretching parameter along the x-axis gives an increasing behavior of velocity field for the first solution; however, it declines for the second solution. It is noted that radiation causes thermal transport to exalt. Moreover, the frictional drag along the x-axis is inclined due to an increment in stretching parameters but declines along the y-axis.
•The ZnO and MWCNT nanoparticles are suspended in engine oil to form ZnO-MWCNT/EO hybrid nanofluid.•We model the flow of a hybrid nanofluid over a biaxial shrinking surface.•The numerical solutions were obtained using the bvp4c solver in Matlab software.•For a specific range of shrinking strength, dual solutions exist.