Does preferential concentration occur in thermal counterflow? EuHIT Funded Project

Team

Pantxo Diribarne
Sbt, Grenoble, France
Mathieu Gibert
CNRS, Grenoble, France
Marco La Mantia
Charles University, Prague, Czech Republic
Bernard Rousset
Cea, Grenoble, France
Ladislav Skrbek
Charles University, Prague, Czech Republic

Overview

Research Infrastructure
Czech Cryogenic Turbulence Facility, Czech Republic
Facilities used
Liquid Helium Flow Visualization (CCTF1)
Project leader
Mickael Bourgoin
LEGI - CNRS, Grenoble, France

Abstract

Preferential concentration of inertial particles in turbulence is one of the most striking features of fluid -particle interaction in classical fluid mechanics. This mechanism possibly plays an important role in many natural and industrial processes (cloud physics, dispersion of polutants, mixing of powders, etc.). From a fundamental point of view, this is classically interpreted as the interaction of particles with specific structures of the carrier flow. For instance particles denser than the fluid are expected to be expelled from high vorticity regions while particles lighter than the fluid concentrate in the core of vortices. Particle segregation can therefore be seen as the signature of the existence of such flow structures. The present project aims at investigating the possible occurence of such a selective spatial segregation of particles in a thermal counterflow in superfluid Helium. Such a diagnosis may give new insight into the eventual existence of large vortical structures in quantum flows, what remains an open question. We propose to port tools commonly used to analyze particle clustering in classical flows (as Voronoï analysis) to this quantum flow.