Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : November 08, 2021 - November 10, 2021
The viscoelastic fluid flow in a rotating double cylinder was investigated by numerical simulation using a finite-difference method. The volume penalization method was used to represent both a rotating concave-convex inner cylinder and a static outer cylinder. The governing equations consist of the stream function-vorticity formulation of the momentum equation and the constitutive equations of the UCM (Upper Convected Maxwell) fluid. The results show that, in steady states, the circumferential velocity is higher than that predicted by the Couette flow solution, with the effective radius of the inner cylinder increasing accordingly. In the vorticity distribution, ring-like high vorticity areas corresponding to the sudden changes in velocity are observed under higher rotating speeds.
