Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Numerical Approach of The Flow Between Rotating Coaxial Cones
F. Yahi, Y. Hamnoune, A. Bouabdallah
Abstract:
This paper presents a numerical study of Taylor-Couette flows between two coaxial cones when the inner cone is rotating rotates with a constant angular velocity and the outer one is at rest. The cones have the same apex angle φ = 12 degrees resulting in a constant gap width so that δ=d/R1max=0.12. Our primary interests are focusing on analysis of laminarturbulent regime to highlight the appearance of different instability modes. The calculations are carried out using a three-dimensional CFD of incompressible viscous flow. This study allowed us to observe the birth of a Taylor cell near the upper edge of the flow system. This cell is followed by the generation of spiral waves for different Taylor numbers. The various obtained results are analysed and compared systematically to the experimental results established in the same case.
Keywords:
CFD simulation, conical cylinders, instability, laminar-turbulent transition regime, spiral mode

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2019.030

In Proceedings Topical Problems of Fluid Mechanics 2019, Prague, 2019 Edited by David Šimurda and Tomáš Bodnár, pp. 223-228 ISBN 978-80-87012-69-7 (Print) ISSN 2336-5781 (Print)