Formation of large scale vortices in the torque maximum region in Taylor-Couette flow EuHIT Funded Project

Team

Christoph Egbers
BTU Cottbus-Senftenberg, Cottbus, Germany
Rodrigo Ezeta
University of Twente, Enschede, Netherlands
Detlef Lohse
Univ of Twente, Enschede, Netherlands
Sebastian Merbold
Brandenburg University of Technology Cottbus-Senftenberg, Cottbus, Germany
Chao Sun
University of Twente, Enschede, Netherlands

Overview

Research Infrastructure
Twente Turbulence Facilities, Netherlands
Facilities used
Twente Turbulent Taylor-Couette System (T3C)
Project leader
Andreas Froitzheim
BTU Cottbus-Senftenberg, Cottbus, Germany

Abstract

We propose experimental investigations of a turbulent Taylor-Couette flow. When both cylinders rotate slightly in counter direction a maximum appears in the angular momentum transport due to a formation of large scale vortices inside the gap. These vortices can survive also in the fully turbulent regime, where turbulent fluctuations were assumed to prevent structure formations. We plan to investigate experimentally the flow field using PIV and LDV in the laboratories at the University of Twente. The main idea is to analyze the contribution of these vortices to the overall angular momentum flux and their strength in the classical turbulent and ultimate turbulent regime at varying rotation rates. We try to get a better understanding of the importance of the Taylor vortices with an increasing level of turbulence.