Concept
Shear flow
Publications associées (143)
The effects of a spur dike location in a 90° sharp channel bend on flow field: Focus on anisotropy degree and anisotropy nature
In this research, the flow features around a spur dike located in a 90˚ sharp channel bend have been studied experimentally in detail. Results showed that the effects of the spur dike on upstream sections increased by increasing α (spur dike location from ...
2023Local gyrokinetic simulations of tokamaks with non-uniform magnetic shear
Stephan Brunner, Justin Richard Ball
In this work, we modify the standard flux tube simulation domain to include arbitrary ion gyroradius-scale variation in the radial profile of the safety factor. To determine how to appropriately include such a modification, we add a strong ion gyroradius-s ...
IOP Publishing Ltd2023Manning's Formula and the Strickler Scaling Derived from a Co-spectral Budget Model
Gabriele Manoli, Sara Bonetti, Gabriel George Katul
Manning's empirical formula in conjunction with Strickler's scaling is widely used to predict the bulk velocity (V) from the hydraulic radius (Rh), the roughness size (r), and the slope of the energy grade line (S) in uniform channel flows at high bulk Rey ...
2023Study of backward Brillouin scattering in gas-filled anti-resonant fibers
Luc Thévenaz, Malak Mohamed Hossameldeen Omar Mohamed Galal, Li Zhang
Brillouin scattering in gas shows unmatched gain properties in hollow-core optical fibers filled at high pressure. Here, the gain characteristics are studied for two common gases, namely, N2 and CO2, which show distinct features and are compared to expecte ...
2023Solids that are also liquids: elastic tensors of superionic materials
Nicola Marzari, Tommaso Chiarotti, Giuliana Materzanini
Superionics are fascinating materials displaying both solid- and liquid-like characteristics: as solids, they respond elastically to shear stress; as liquids, they display fast-ion diffusion at normal conditions. In addition to such scientific interest, su ...
NATURE PORTFOLIO2023Scanning Small-Angle X-ray Scattering of Injection-Molded Polymers: Anisotropic Structure and Mechanical Properties of Low-Density Polyethylene
Marianne Liebi, Manuel Guizar Sicairos
Injection molding is known to create a layered anisotropicmorphologyacross the sample thickness due to varying shear and cooling ratesduring the manufacturing process. In this study, scanning small-angleX-ray scattering was used to visualize and quantify t ...
AMER CHEMICAL SOC2023Effects of the parallel flow shear on the ITG-driven turbulent transport in tokamak plasmas
Yann Camenen, Javier García Hernández, Samuele Mazzi
The impact of the parallel flow shear on the tokamak plasma stability and turbulent transport driven by the ion temperature gradient (ITG) modes is analyzed by means of local gyrokinetic numerical analyses. It is shown that the parallel flow shear increase ...
IOP Publishing Ltd20223D printing of elastomeric mechanical sensors designed for human motion monitoring
In this thesis several advances are made to the emerging field of 3D printed mechanical sensors. Techniques and processes were developed to enable the integration of highly conductive, and capacitive and piezoresistive sensing features embedded within 3D p ...
EPFL2022Maximizing friction by liquid flow clogging in confinement
Ignacio Pagonabarraga Mora, Xiaoqi Zhang, Shan Chen
In the nanoscale regime, flow behaviors for liquids show qualitative deviations from bulk expectations. In this work, we reveal by molecular dynamics simulations that plug flow down to nanoscale induces molecular friction that leads to a new flow structure ...
SPRINGER2022Fault roughness’s influence on experimental fault mechanical behavior
Brice Tanguy Alphonse Lecampion, Marie Estelle Solange Violay, Barnaby Padraig Fryer, Seyyedmaalek Momeni, François Xavier Thibault Passelègue, Carolina Giorgetti
Fault slip behavior and earthquake nucleation are often framed within the context of velocity-dependent friction, ranging from velocity-strengthening to velocity-weakening behavior. Previous studies have shown that fault roughness controls the fault slip b ...
2022