Publications related to Fluid mechanics

Mixing and diffusion for rough shear flows

This article addresses mixing and diffusion properties of passive scalars advected by rough (

C^\alpha

) shear flows. We show that in general, one cannot expect a rough shear flow to increase the rate of inviscid mixing to more than that of a smooth shear ...

2021

Evolution of the vorticity distribution in vortex rings

Guillaume de Guyon-Crozier

Vortex rings are very efficient at transporting fluid on long distances and can generate large forces, either thrust or drag. These abilities are influenced by the vorticity distribution within the vortex. Previous work on vortices produced by piston-cylin ...

EPFL2021

Edge turbulence in ISTTOK: a multi-code fluid validation

Paolo Ricci, Davide Galassi, Fabio Riva, Rogério Manuel Cabete De Jesus Jorge, Eric Serre

Fluid models used to study the edge plasma region need to be benchmarked against similar conditions given that models can strongly differ in complexity and therefore the results they produce. Via this validation study undertaken through the framework of EU ...

IOP PUBLISHING LTD2021

Development of a freely distributable CFD tool for approximate and detailed simulations of the flow around a complex of buildings

Indo-Swiss Building Energy Efficiency Project (BEEP) is a cooperation project between the Ministry of Power, Government of India, and the Federal Department of Foreign Affairs of the Swiss Confederation. Started in 2011, the project's central focus is to h ...

IOP PUBLISHING LTD2021

Permeability properties of composite reinforcements

Véronique Michaud

Permeability is defined here from the equations of fluid flow through porous media. It represents, for composite reinforcements, a measure for their ease of impregnation by a fluid resin. Modeling of the saturated permeability tensor is presented using a h ...

Woodhead Publishing2021

The breakthrough time of a hydraulic fracture contained between two tough layers

Brice Tanguy Alphonse Lecampion, Carlo Peruzzo, Judith Marie Colette Capron

Hydraulic fracturing is a widespread technology used to enhance reservoir production but also to measure the in-situ stress field. It consists of growing a tensile (mode I) fracture via the injection of a viscous fluid (usually at a constant rate) from a w ...

2021

Numerical and experimental comparisons of the coplanar coalescence of two fluid-driven fractures

Brice Tanguy Alphonse Lecampion, Carlo Peruzzo

The coalescence of two coplanar fractures growing under the symmetric injection of a Newtonian fluid from two point sources provides a unique data set to validate theoretical predictions of hydraulic fracture (HF) growth. We test the theoretical prediction ...

2021

Pseudomomentum: origins and consequences

Harmeet Singh

The balance of pseudomomentum is discussed and applied to simple elasticity, ideal fluids, and the mechanics of inextensible rods and sheets. A general framework is presented in which the simultaneous variation of an action with respect to position, time, ...

2021

Hydraulic fracture growth in quasi-brittle materials

Dong Liu

Hydraulic fracturing is a technique often used in the oil and gas industry to enhance the production of wells in low-permeability reservoirs. It consists of fluid injection at a sufficiently large injection rate to create and propagate tensile fractures in ...

EPFL2021

Numerical characterization and engineering of transport in morphologically complex heterogeneous media

Xiaoyu Dai

A multi-scale numerical methodology for the assessment of radiation and optical characteristics of complex structured soot-contaminated snow layers was investigated first. The methodology accounted for the exact morphology at the various scales and utilize ...

EPFL2021

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Mixing and diffusion for rough shear flows

Evolution of the vorticity distribution in vortex rings

Edge turbulence in ISTTOK: a multi-code fluid validation

Development of a freely distributable CFD tool for approximate and detailed simulations of the flow around a complex of buildings

Permeability properties of composite reinforcements

The breakthrough time of a hydraulic fracture contained between two tough layers

Numerical and experimental comparisons of the coplanar coalescence of two fluid-driven fractures

Pseudomomentum: origins and consequences

Hydraulic fracture growth in quasi-brittle materials

Numerical characterization and engineering of transport in morphologically complex heterogeneous media

Numerical and experimental comparisons of the coplanar coalescence of two fluid-driven fractures

Development of a freely distributable CFD tool for approximate and detailed simulations of the flow around a complex of buildings

Hydraulic fracture growth in quasi-brittle materials

Edge turbulence in ISTTOK: a multi-code fluid validation

Permeability properties of composite reinforcements

The breakthrough time of a hydraulic fracture contained between two tough layers

Pseudomomentum: origins and consequences

Numerical characterization and engineering of transport in morphologically complex heterogeneous media

Mixing and diffusion for rough shear flows

Evolution of the vorticity distribution in vortex rings