This paper aims to inspect the mixed convective peristaltic transport of ternary hybrid nanofluids between two sinusoidally deforming lubricated curved concentric tubes. Titanium, Alumina, and copper nanoparticles are taken for the current problem with blood as a base fluid. The heat equation is also modeled in the presence of heat generation/absorption. The curved shape structure of flow geometry from the external side with a flexible complex nature of the peristaltic endoscope present inside that is similar to the endoscopy of a living organ. The governing expressions of the proposed model are followed under the long wavelength and small Reynolds number hypothesis. The exact solutions for flow fields that is, velocity, temperature, pumping phenomenon, and streamlines are attained by utilizing the separation of variable technique. Furthermore, graphs are used to examine and discuss different parameters outcomes. The outcomes reveal that liquid velocity enhances near the outer wall of the sinusoidal curved tube but it declines with the peristaltic endoscope for enhancing curvature parameter. The fluid temperature is reduced by enhancing the values of curvature parameter.

Vertical channels between two flat plates have a wide range of engineering applications, such as heat exchangers, chemical processing equipment, electronic component heat dissipation, and so on. Therefore, this analysis examines the significance of variable properties on the dynamics of Casson fluid in a vertical channel due to mixed convection when thermal radiation and Joule heating are significant. The combined effects of temperature-dependent plastic dynamics viscosity and temperature-dependent thermal conductivity are analyzed. Moreover, the evaluation of heat transfer is further supported by viscous dissipation. The nondimensional governing equations are elucidated analytically by employing the perturbation technique and numerically by Runge–Kutta method with the shooting technique. The effects of numerous dimensionless parameters on fluid flow are featured through graphs. In addition, the heat transfer rate and the skin friction coefficient are computed and scrutinized. It is reported that velocity depicts enhancing behavior for higher values of the Casson fluid and slip parameters. It has also been observed that the fluid temperature decreases with an increase in the thermal conductivity parameter.

Cilia motion is commonly located in mammalian cells of living organisms which continually grow and feature conspicuously. The ciliary apparatus is associated with cell cycle movement and proliferation, and cilia play a dynamic part in human and animal growth and everyday life. The motivation of these applications, a theoretical model is presented to examine the viscous dissipation effects on the ciliary flow of micropolar fluid through a two- two-dimensional channel under slip constraints. The flow is controlled by the metachronal wave propagation generated by cilia beating on the inner walls of the channel. The model comprises the motivational aspects of radiative flux and predicts the parametric ranges for excellent heat transfer results. The normalized equations are simplified by the lubrication hypothesis and analytical outcomes are attained by integration technique. Graphical illustrations have been utilized to explore the impressions of the derived physical parameters on the flow configurations to give each parameter a physical interpretation. Special attention is given to investigating the pumping and trapping characteristics of the micropolar fluid due to ciliary metachronism. The major outcomes disclosed that the fluid velocity upsurges for enhancing values of coupling number and micropolar parameter. The pressure gradient increased with the slip parameter, providing insights into flow control, particularly where minimizing or enhancing shear is critical. The fluid temperature is enhanced by enhancing the Brickman number however temperature is decreased by increasing the thermal radiation parameter.