Rotating turbulent Rayleigh-Bénard convection at high Prandtl numbers EuHIT Funded Project

Team

Guillaume Castanet
Université de Lorraine, Vandoeuvre-les-Nancy, France
Viswa Maitreyi Moturi
University of Strasbourg, Strasbourg, France
Nicolas Rimbert
Université de Lorraine, Vandoeuvre-lès-Nancy, France
Olga Shishkina
Max Planck Institute for Dynamics and Self-Organization, Goettingen, Germany
Stephan Weiss
Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany

Overview

Research Infrastructure
Max Planck High-Turbulence Facility, Germany
Facilities used
High-pressure Convection Facility (GTF2)
Project leader
Funfschilling Denis
CNRS - University of Strasbourg, Strasbourg, France

Abstract

Convection in the earth mantle is of primary importance for geophysicists. This turbulent Rayleigh-Bénard convection occurs at high Prandtl numbers in the rotating frame of the earth. The case of low Prandtl numbers turbulent RBC has been studied extensively experimentally and numerically in gases or water experiments, while the case of high Prandtl numbers is much less known. In this project, we plan to use the two-color Laser Induced Fluorescence thermometry in order to characterize the temperature field of the plumes. Time-resolved measurements carried out with this technique will also allow visualizing the temporal evolution of the plumes which carry most of the heat between the top and bottom boundary layers and organize themselves to drive the large scale circulation or rise in cyclonic and anti-cyclonic vortex structures at higher rotation rates. The obtained experimental results will be compared with direct numerical simulations carried out in similar conditions.