Publications associées à Discrete shedding of secondary vortices along a modified Kaden spiral

Publications associées (12)

Ideal and Resistive Impurity Parallel-velocity-gradient Instability

The presence of impurity ions in magnetically confined plasmas can significantly influence micro-instabilities, impacting cross-field transport and ultimately affecting fusion performance. In particular, Parallel Velocity Gradient (PVG) instability, common ...

IOP Publishing Ltd2025

On the symmetry-breaking instability of the flow past axisymmetric bluff bodies

Romain Gauthier, Edouard Boujo

The primary bifurcation of the flow past three-dimensional axisymmetric bodies is investigated. We show that the azimuthal vorticity generated at the body surface is at the root of the instability, and that the mechanism proposed by Magnaudet & Mougin (200 ...

2025

The Combined Effects of Vertical and Horizontal Shear Instabilities in Stellar Radiative Zones

Saniya Khan

Shear instabilities can be the source of significant amounts of turbulent mixing in stellar radiative zones. Past attempts at modeling their effects (either theoretically or using numerical simulations) have focused on idealized geometries, where the shear ...

Iop Publishing Ltd2024

Gyrokinetic flux-driven simulations in mixed TEM/ITG regime using a delta-f PIC scheme with evolving background

Laurent Villard, Stephan Brunner, Moahan Murugappan, Giovanni Di Giannatale

In the context of global gyrokinetic simulations of turbulence using a particle-in-cell framework, verifying the delta-f assumption with a fixed background distribution becomes challenging when determining quasi-steady state profiles corresponding to given ...

American Institute of Physics (AIP)2024

Reduced order modeling for parametrized generalized Newtonian fluid flows

Ricardo Reyes Sotomayor

Non-Newtonian fluids are present in most manufacturing industry processes. Computa-tional models used to describe the rheological behavior of such materials can be costly due to the non-linear behavior of the viscosity. This work presents a parametrized pr ...

2023

Best-fit constraint equations for coupling mixed-dimension simulation models with wide flange cross sections

Dimitrios Lignos, Albano António De Abreu E Presa De Castro E Sousa, Alexander Riley Hartloper

A new mixed-dimension coupling method is formulated for members with (bi-symmetric) wide flange cross sections based on the idea of least squares transformations between two sets of point clouds. This coupling method imposes the minimum number of constrain ...

ELSEVIER2022

Hydrodynamic-driven morphogenesis of karst draperies: spatio-temporal analysis of the two-dimensional impulse response

François Gallaire, Matthieu Wyart, Pier Giuseppe Ledda, Gaëtan Pierre Clément Lerisson

We study the role of hydrodynamic instabilities in the morphogenesis of some typical karst draperies structures encountered in limestone caves. The problem is tackled using the long wave approximation for the fluid film that flows under an inclined substra ...

Cambridge University Press2021

Coupling of non-conforming trimmed isogeometric Kirchhoff-Love shells via a projected super-penalty approach

Annalisa Buffa, Luca Coradello

Penalty methods have proven to be particularly effective for achieving the required C-1-continuity in the context of multi patch isogeometric Kirchhoff-Love shells. Due to their conceptual simplicity, these algorithms are readily applicable to the displace ...

ELSEVIER SCIENCE SA2021

Experimental facility for reduced scale model testing of hydraulic machines hybridized with a battery energy storage system

Mario Paolone, Sidi-Rachid Cherkaoui, Elena Vagnoni, Francesco Gerini, Martin Seydoux

With a continuously growing share of non-dispatchable renewable energy sources in the power mix, flexibility in hydropower provision is becoming fundamental. The major role played by hydropower in frequency regulation in the last years has underlined the p ...

IOP Publishing2021

On the modelling of the transition between contact-line and microlayer evaporation regimes in nucleate boiling

Lubomír Bures

Formation of a microlayer in nucleate boiling results in substantial changes to the heat-transfer dynamics of the process, and establishing a criterion to distinguish between the microlayer and contact-line regimes encountered is necessary to obtain a quan ...

Cambridge University Press2021

Collisionless losses of fast ions in the divertor tokamak test due to toroidal field ripple

Matteo Vallar

In this paper we analyze fast ion motion in the divertor tokamak test (DTT) device (Albanese et al 2017 Nucl. Fusion 57 016010). It is planned that DTT will be heated through a mix of 45 MW heating power, including 15 MW negative-ion-based neutral beam hea ...

IOP Publishing Ltd2021

Experimental investigation of two-dimensional delamination in GFRP laminates

Thomas Keller, Anastasios Vassilopoulos, Aida Cameselle Molares

The 2D delamination behavior of composite laminates under quasi-static out-of-plane opening loading has been experimentally investigated. A circular embedded pre-crack was introduced in the center and at the midplane of the laminates. To investigate the ef ...

2018