Study of flow of Buongiorno nanofluid in a conical gap between a cone and a disk

The cone–disk apparatus consists of a cone that touches the disk at its apex and is used in medical evices, viscosimeters, conical diffusers, etc. Theoretically, three-dimensional flow nanofluid gap studied for four different physical configurations. Buongiorno model, consisting thermophoresis Brownian diffusion mechanisms, to describe convective heat transport nanofluid. continuity equation, Navier–Stokes momentum conservation nanoparticle volume fraction equation constitute governing system nanofluids. Lie group approach obtain self-similar equations. Solutions are computed an appropriate rotational Reynolds number angles examine flow, mass, features. skin friction coefficients torque analyzed. Multivariate nonlinear regression analysis also performed. A co-rotating configuration has been shown produce less due increased centrifugal force. Of configurations, maximum heat/mass occurs rotating with static all selected angles, least drag radial direction attained disk. In addition, there minimal along tangential counter-rotating configuration. nanoparticles lead higher fluid temperature and, thus, lower Nusselt numbers obtained.