Vorticity Annihilation at High Reynolds Numbers - A Question of Initial Conditions? EuHIT Funded Project

Team

Frieder Kaiser
Karlsruhe Institute of Technology, Karlsruhe, Germany
David E. Rival
Queen's University, Kingston, Canada
Joel Sommeria
Centre National de la Recherche Scientifique, Grenoble, France
Samuel Viboud
CNRS, Grenoble, France
Malte von der Burg
Karlsruhe Institute of Technology, Karlsruhe, Germany

Overview

Research Infrastructure
CORIOLIS Rotating Platform, France
Facilities used
Coriolis Rotating Platform (Coriolis)
Project leader
Jochen Kriegseis
Karlsruhe Institute of Technology, Karlsruhe, Germany

Abstract

The project aims at understanding how rapid vorticity annihilation takes place across a sharp vortical interface at high Reynolds numbers. In order to characterize this process, two distinct yet equivalent cases are contrasted. Particularly, development and annihilation of vorticity is directly compared between one case with an irrotational core and its corollary with opposite-signed vorticity across this interface. These experiments will take advantage of planar, stereo and scanning PIV measurement capabilities at the Coriolis facility in Grenoble where the tank will either be rapidly started from rest or decelerated from constant rotation. The findings will be contrasted to small-scale laminar experiments that are being performed both in Karlsruhe and at Queen’s and will offer deep insight into the scaling of rapid vorticity annihilation processes over a broad range of Reynolds numbers.