Laboratoire de Mécanique des Fluides et d'Acoustique - UMR 5509

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Accueil > Actualités > Thèses - Habilitations à diriger des recherches > Thèses soutenues 2017

Soutenance de thèse ECL

Robert Chahine

Jeudi 30 novembre 2017 à 14h00, amphi 201 - ECL

Robert Chahine

MHD simulations of the Reversed Field Pinch

With the increase of the world’s energy consumption caused by the global development of the industrial sector, the fossil fuel reserve is diminishing and the nuclear fusion is proposed to be one of the alternative sources of energy. The advantages of the nuclear fusion, if achieved, it could possibly generate large amounts of energy by using two isotopes of hydrogen (deuterium and tritium) that can be obtained by processing water, a resource considered as almost unlimited. Furthermore, nuclear fusion is not limited by any weather constraints and generates a small amount of nuclear waste compared to nuclear fission. One of the methods to achieve a controlled thermonuclear fusion reaction is Magnetic Confinement Fusion (MCF), which consists in heating the deuterium-tritium plasma up to temperatures of the order of 150×10^6 K. At these high temperatures, the plasma is ionized and hence becomes controllable by magnetic fields. This is the concept of a Magnetic Confinement Fusion reactor, where strong magnetic fields are used to hold the hot ionized plasma isolated from the reactor’s wall, since no material on planet Earth can support such high temperatures.

In the past decades, several magnetic configurations were proposed to achieve controlled thermonuclear fusion reactions. Between these configurations, three configurations remained most promising : the tokamak, the Reversed Field Pinch (RFP) and the stellarator. The technically easiest configuration is the RFP, which we explore its dynamics using the Magnetohydrodynamics (MHD) model that consists in studying the interaction of a conducting fluid flow (the plasma in our case) and a magnetic field.

In this presentation, after briefly presenting the different Magnetic Confinement Fusion Reactors, we will focus on the RFP, namely the importance of the pressure and the poloidal cross-section’s shape on its dynamics, and its ability to amplify a weak seed magnetic field, also known as dynamo effect.

Jury :

  • Olivier Agullo
  • Wouter Bos - Directeur de Thèse
  • Susanna Cappello - Rapporteur
  • Benjamin Favier
  • Daniel Henry
  • Pablo Mininni - Rapporteur
  • Nicolas Plihon


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