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Phenomena in Geophysical Fluids: Part I
Published in Osamu Morita, Classical Mechanics in Geophysical Fluid Dynamics, 2019
Suppose an incompressible viscous fluid of annulus confined between two coaxial cylinders rotating with different angular velocities. A flow confined between two rigid parallel plates moving with different velocities is called the Couette flow, and the laminar flow confined between two coaxial cylinders is referred to as the circular Couette flow or the Taylor–Couette flow.
Magnetohydrodynamics buoyancy-driven unsteady Couette flow with fluctuating viscosity
Published in International Journal of Ambient Energy, 2022
Adetayo Samuel Eegunjobi, Oluwole Daniel Makinde
Couette flow is conceivably one of the simplest classical viscous flows in fluid mechanics with a wide range of engineering and industrial applications. It refers to the flow of a viscous fluid between two surfaces, one of which is moving tangentially relative to the other. Such flow process can be found in extrusion, power generator, pumps, bioreactor rotation, polymer technology and purification of crude oil just to mention a few. For instance, in the industrial extrusion process, the gap between the barrel and the screw of the extruder is small, the fluid flow can be considered as shear flow between parallel plates. Bearing’s lubrication in engineering device involves rotating shafts, the gap between the shaft and the outer static surface is small, consequently, the flow can be considered locally as Couette flow between parallel plates (Schlichting 1979). Wind-driven flow scenario in a body of water may be approximated as a Couette flow. Moreover, the Taylor-Couette flow device is widely used in many chemicals, mechanical and nuclear engineering processes. The device consists of one cylinder rotating and the other at rest, or two cylinders rotating in the same or counter directions. The distribution of energy loss in the device may greatly influence the industrial process of mixing, diffusion, heat transfer, and flow stabilities.