Multiple slip effects on nanofluid dissipative flow in a converging/diverging channel: A numerical study

A mathematical model is developed for viscous slip flow and heat transfer in water/Ethylene glycol-based nanofluids containing metallic oxide nanoparticles, through a converging/diverging channel. We adopt the single-phase Tiwari–Das model. The governing equations are transformed to set of similarity differential with help transformation, before being solved numerically using Maple 20. Validation velocity gradient temperature solutions achieved second-order implicit finite difference Keller Box method. Further validation included special case no-slip nanofluid absence heating. effects parameters, namely slip, thermal jump, channel apex angle, Eckert number, Prandtl Reynolds nano-particle volume fraction on velocity, temperature, skin friction, rate investigated detail. It found that increasing water-TiO2 ethylene glycol-TiO2 nanofluids, bulk decelerated whilst greater solid (nanoparticle) presence momentum also retarded. With semivertex generally accelerated. An increase divergent semiangle leads decelerate from centerline core region, whereas near at wall, it results weak acceleration. Higher temperatures values, both nanoparticle fraction, weakly decreased more significant decrease observed nanofluid. diverging substantial caused by numbers, reverse effect computed converging novelty current work extends previous studies include multiple heating (Eckert number effects), which shown exert influence characteristics. study relevant certain pharmaco-dynamics devices (drug delivery), next-generation 3D nanotechnological printers, nano-cooling systems energy engineering where laminar flows diverging/converging channels arise