Publications associées à The impact of the Boussinesq approximation on plasma turbulence in the scrape-off layer

Turbulent transport regimes in the tokamak boundary

The overall performance of a tokamak strongly depends on phenomena that take place in a thin region between the main plasma and the vessel wall, which is denoted as tokamak boundary. In fact, the formation of transport barriers in this region can significa ...

EPFL2022

Global fluid simulation of plasma turbulence in a stellarator with an island divertor

Paolo Ricci, Joaquim Loizu Cisquella, Maurizio Giacomin, António João Caeiro Heitor Coelho

Results of a three-dimensional, flux-driven, electrostatic, global, two-fluid turbulence simulation for a five-field period stellarator with an island divertor are presented. The numerical simulation is carried out with the GBS code, recently extended to s ...

2022

Grassmannian diffusion maps based surrogate modeling via geometric harmonics

A novel surrogate model based on the Grassmannian diffusion maps (GDMaps) and utilizing geometric harmonics (GH) is developed for predicting the response of complex physical phenomena. The method utilizes GDMaps to obtain a low-dimensional representation o ...

2022

Validation of edge turbulence codes against the TCV-X21 diverted L-mode reference case

Paolo Ricci, Holger Reimerdes, Christian Gabriel Theiler, Sophie Danielle Angelica Gorno, Claudia Colandrea, Nicola Vianello, Davide Galassi, Cedric Kar-Wai Tsui, Hugo De Oliveira, Maurizio Giacomin, Eric Serre, Nicola Offeddu

Self-consistent full-size turbulent-transport simulations of the divertor and scrape-off-layer (SOL) of existing tokamaks have recently become feasible. This enables the direct comparison of turbulence simulations against experimental measurements. In this ...

IOP Publishing Ltd2022

Tree-cotree decomposition of isogeometric mortared spaces in H(curl) on multi-patch domains

Bernard Kapidani, Rafael Vazquez Hernandez

When applying isogeometric analysis to engineering problems, one often deals with multi-patch spline spaces that have incompatible discretisations, e.g. in the case of moving objects. In such cases mortaring has been shown to be advantageous. This contribu ...

ELSEVIER SCIENCE SA2022

First global simulations of plasma turbulence in a stellarator with an island divertor

Paolo Ricci, Joaquim Loizu Cisquella, António João Caeiro Heitor Coelho

We present the results of 3D, flux-driven, global, two-fluid electrostatic turbulence simulations in a 5-field period stellarator with an island divertor. The numerical simulations are carried out with the GBS code, which solves the two-fluid drift-reduced ...

2021

Effect of collisions on non-adiabatic electron dynamics in ITG-driven microturbulence

Stephan Brunner, Justin Richard Ball

Non-adiabatic electron response leads to significant changes in ion temperature gradient (ITG) eigenmodes, leading, in particular, to fine-structures that are significantly extended along the magnetic field lines at corresponding mode rational surfaces (MR ...

AIP Publishing2021

X-point potential well formation in diverted tokamaks with unfavorable magnetic field direction

Basil Duval, Holger Reimerdes, Joaquim Loizu Cisquella, Marco Wischmeier, Mirko Wensing

Fluid simulations of the boundary of fusion plasmas predict the formation of an electric potential well in the vicinity of the X-point in detached divertor conditions with Bt in the unfavorable direction for H-mode access. This potential well arises when t ...

2020

Investigating Scrape-Off Layer transport in alternative divertor geometries on the TCV tokamak

Roberto Maurizio

Thermonuclear fusion is a potentially clean and limitless energy source that can substantially change the current global electricity generation mix, which is highly dependent on limited fossil fuels. This thesis contributes to the development of fusion en ...

EPFL2020

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Basil Duval, Holger Reimerdes, Christian Gabriel Theiler, Joaquim Loizu Cisquella, Sophie Danielle Angelica Gorno, Claudia Colandrea, Marco Wischmeier, Cedric Kar-Wai Tsui, Mirko Wensing, Hugo De Oliveira

Recent TCV experiments confirm the predicted formation of an electric potential well, below the magnetic X-point, in configurations with unfavorable

B_t

field direction (ion

\nabla B

drift away from the divertor), that substantially reshapes the typica ...

2020

The impact of the Boussinesq approximation on plasma turbulence in the scrape-off layer

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Turbulent transport regimes in the tokamak boundary

Global fluid simulation of plasma turbulence in a stellarator with an island divertor

Grassmannian diffusion maps based surrogate modeling via geometric harmonics

Validation of edge turbulence codes against the TCV-X21 diverted L-mode reference case

Tree-cotree decomposition of isogeometric mortared spaces in H(curl) on multi-patch domains

First global simulations of plasma turbulence in a stellarator with an island divertor

Effect of collisions on non-adiabatic electron dynamics in ITG-driven microturbulence

X-point potential well formation in diverted tokamaks with unfavorable magnetic field direction

Investigating Scrape-Off Layer transport in alternative divertor geometries on the TCV tokamak

Experimental verification of X-point potential well formation in unfavorable magnetic field direction

Investigating Scrape-Off Layer transport in alternative divertor geometries on the TCV tokamak

Turbulent transport regimes in the tokamak boundary

Grassmannian diffusion maps based surrogate modeling via geometric harmonics

First global simulations of plasma turbulence in a stellarator with an island divertor

Tree-cotree decomposition of isogeometric mortared spaces in H(curl) on multi-patch domains

Effect of collisions on non-adiabatic electron dynamics in ITG-driven microturbulence

Validation of edge turbulence codes against the TCV-X21 diverted L-mode reference case

Global fluid simulation of plasma turbulence in a stellarator with an island divertor

X-point potential well formation in diverted tokamaks with unfavorable magnetic field direction

Experimental verification of X-point potential well formation in unfavorable magnetic field direction