Taylor-Couette flow with asymmetric end-walls boundary conditions

etc15 Tracking Number 132

Presentation:
Session: Instability and Transition 2
Room: Room A
Session start: 15:00 Tue 25 Aug 2015

Torsten Seelig   Torsten.Seelig@tu-cottbus.de
Affifliation: Department of Aerodynamics and Fluid Mechanics, Brandenburg University of Technology, Cottbus, Germany
Kamil Kielczewski   kamil.k.kielczewski@gmail.com
Affifliation: Institute of Thermal Engineering, Poznan University of Technology, Poznan, Poland
Ewa Tuliszka-Sznitko   ewa.tuliszka-sznitko@put.poznan.pl
Affifliation: Institute of Thermal Engineering, Poznan University of Technology, Poznan, Poland
Uwe Harlander   uwe.harlander@tu-cottbus.de
Affifliation: Department of Aerodynamics and Fluid Mechanics, Brandenburg University of Technology, Cottbus, Germany
Christoph Egbers   egbers@tu-cottbus.de
Affifliation: Department of Aerodynamics and Fluid Mechanics, Brandenburg University of Technology, Cottbus, Germany
Patrick Bontoux   bontoux@L3M.univ-mrs.fr
Affifliation: M2P2, CNRS, Aix Marseille Universite, Ecole Centrale Marseille, Marseille, France

Topics: - Instability and transition, - Wall bounded flows

Abstract:

In the paper the authors present the results obtained during a numerical (Direct Numerical Simulation/Spectral Vanishing Viscosity method - DNS/SVV) and experimental investigations (Kalliroscope, PIV) of the Taylor-Couette flow with asymmetric boundary conditions. In the paper attention is focused on the laminar-turbulent transition process. The main purpose of the research is to investigate the inﬂuence of diﬀerent parameters (aspect ratio, curvature parameter, end-walls boundary conditions) on the ﬂow structure and on the ﬂow characteristics. The transverse current Jω is computed from the velocity ﬁeld obtained numerically. The λ2 criterion has been used for numerical visualization.