job_db200a1bd7ec487be4e02545328e9a27.md 1.79 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Title: Quantum Turbulence : Three-Fluid Modeling - Phenomenology and Numerical Simulations
Date: 2021-07-18 22:19
Slug: job_db200a1bd7ec487be4e02545328e9a27
Category: job
Authors: Emmanuel Lévêque
Email: emmanuel.leveque@ec-lyon.fr
Job_Type: Post-doctorat
Tags: postdoc
Template: job_offer
Job_Location: Ecole Centrale de Lyon, Ecully (France)
Job_Duration: 1 year
Job_Website: 
Job_Employer: Ecole Centrale de Lyon
Expiration_Date: 2021-10-10
Attachment: job_db200a1bd7ec487be4e02545328e9a27_attachment.pdf

Quantum turbulence can be treated at a coarse-grained level as a problem of classical fluid
dynamics by considering a mixture of two interacting fluids: a normal fluid with a non-zero
viscosity and an inviscid superfluid. The dynamics then obeys a system of Navier-Stokes
and Euler equations coupled by a mutual friction force modelling the interactions between
the elementary vortices of the superfluid component and the normal fluid. This is the
framework of the so-called two-fluid model initiated by Landau and Tisza in 1941. The
present program aims at extending this framework by accounting explicitly for the coarse-grained dynamics of the superfluid elementary vortices, viewed as a third-fluid component.

The successful candidate will perform pseudo-spectral simulations of quantum turbulence
encompassing three-fluid modelling by using an operational internal code (in Fortran). The
results will be compared with recent experimental data and previous numerical results
obtained with the two-fluid model. This study will contribute to improve our understanding
of multiscale properties of quantum turbulence.

This program is part of a major project called Quantum Turbulence Exploration by HighPerformance Computing (QuteHPC) funded by the French National Research Agency (ANR): <http://qute-hpc.math.cnrs.fr/>