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The goal of the present article is to investigate the three dimensional electromagnetic flow and heat transfer behavior of Casson nanofluids with suspension of SWCNT/MWCNT nanomaterials due to shrinking rotating disk. Introduction of Revised Hamilton’s Crosser model revealing the interfacial nanolayer and shape effects is the novelty of the present disk flow problem. Entropy generation, viscous dissipation, Joule heating, thermal radiation and shape effect are taken into consideration in the developed model. Apposite modified transformations are invoked to have a system of non-linear differential equations. Shooting technique cum Runge-Kutta fourth order algorithm is the instrumental for the established numerical solution. The outcomes reveal that velocity components (axial, radial and tangential) amplify under the influence of enhanced buoyancy, rotation strength parameter and electric parameter subject to shrunk rotating disk. Augmented interfacial ratio parameter, Brinkman number, electric parameter and solid volume fraction upsurge the rate of heat transportation. Surface viscous drag, heat transfer rate, and entropy generation rate are all increased when the form factor is increased, but the Bejan number is decreased. Moreover, it is observed that MWCNT is more efficient than SWCNT.

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