Publications related to A field study of turbulent flows in shallow gravel-bed rivers

RAS and LES Simulation of the supercritical flow over the waving bed.

Christophe Ancey, Joris Heyman, François Mettra, Hongbo Ma

The phenomena of bed forms exist widely in the natural rivers and are still not fully understood. The detailed sediment dynamics near the bed is essential for this problem. However, the fluid dynamics near the bed, which drives the sediment motion, is not ...

2013

Edge states for the turbulence transition in the asymptotic suction boundary layer

Tobias Schneider, Tobias Klaus Kreilos

We demonstrate the existence of an exact invariant solution to the Navier-Stokes equations for the asymptotic suction boundary layer. The identified periodic orbit with a very long period of several thousand advective time units is found as a local dynamic ...

Cambridge University Press2013

Wind Tunnel Experiments and Modelling of Particle-Laden Boundary Layer Flows

Michael Lehning, Benjamin Andreas Walter

Particle-laden boundary flows occur in many geophysical and industrial environments yet are difficult to understand and quantitatively describe because the interactions of an often turbulent boundary layer flow with surface and particle dynamics are comple ...

2013

Turbulent flow within a random array of rigid, emergent stems : Laboratory characterization of the drag coefficient

Anton Schleiss, Mário Jorge Rodrigues Pereira Da Franca, Ana Margarida Da Costa Ricardo

Within the bioengineering framework, designing a non-erodible channel is a complex fluid dynamics problem as it involves knowing the drag exerted on the boundary, the drag exerted on the plant stems and the overall friction slope. Most of the existing desi ...

TPU2013

Large-scale Computation of the Pump-Turbine Rotating Stall

François Avellan, Olivier Pacot, Chisachi Kato

The purpose of this paper is to show the feasibility of a large-scale unsteady flow computation. This computation consists in the simulation of the rotating stall appearing into a pump-turbine operating at part load condition (Q/QBEP=76%) in pumping mode. ...

2013

Evaluation of subgrid-scale models in large-eddy simulation of flow past a two-dimensional block

Fernando Porté Agel, Wai Chi Cheng

Large-eddy simulations of flow past a two-dimensional (2D) block were performed to evaluate four sub-grid-scale (SGS) models: (i) the traditional Smagorinsky model, (ii) the Lagrangian dynamic model, (iii) the Lagrangian scale-dependent dynamic model, and ...

Elsevier2013

A flow sensing model for mesenchymal stromal cells using morphogen dynamics

Dominique Pioletti, Alexandre Terrier, Miguel Gortchacow

The differentiation of mesenchymal stromal cells has been shown to be af- fected by many parameters such as morphogens, flow rate, medium viscosity, and shear stress when exposed to fluid flow. The mechanism by which these cells sense their environment is ...

Elsevier2013

EXPERIMENTAL VALIDATION OF A CONSTANT SURFACE SHEAR STRESS IN PARTICLE SALTATION LAYERS

Benjamin Andreas Walter

Owens second hypothesis [1] states that the surface shear stress induced by the fluid on the stationary sediment on the ground in a particle saltation layer equals the threshold for particle entrainment. Despite the fact that most numerical models describi ...

2013

Forced reattachment in separated flows: a variational approach to recirculation length reduction

François Gallaire, Edouard Boujo

Sensitivity analysis is used to design an open-loop control for separated flows. The length of the recirculation region

l_c

is expressed as a cost functional, and its sensitivity to actuation is derived analytically. This analysis allows to identify regi ...

2013

A New Sensor Platform for Investigating Turbulence in Stratified Coastal Environments

Ulrich Lemmin, Damien Bouffard

Characterizing and quantifying vertical exchange processes is essential for understanding physical and biological dynamics in stratified lakes and oceans. Unfortunately, the role of mixing is still poorly understood because of the challenges of conducting ...

American Meteorological Society2013

A field study of turbulent flows in shallow gravel-bed rivers

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RAS and LES Simulation of the supercritical flow over the waving bed.

Edge states for the turbulence transition in the asymptotic suction boundary layer

Wind Tunnel Experiments and Modelling of Particle-Laden Boundary Layer Flows

Turbulent flow within a random array of rigid, emergent stems : Laboratory characterization of the drag coefficient

Large-scale Computation of the Pump-Turbine Rotating Stall

Evaluation of subgrid-scale models in large-eddy simulation of flow past a two-dimensional block

A flow sensing model for mesenchymal stromal cells using morphogen dynamics

EXPERIMENTAL VALIDATION OF A CONSTANT SURFACE SHEAR STRESS IN PARTICLE SALTATION LAYERS

Forced reattachment in separated flows: a variational approach to recirculation length reduction

A New Sensor Platform for Investigating Turbulence in Stratified Coastal Environments

A flow sensing model for mesenchymal stromal cells using morphogen dynamics

EXPERIMENTAL VALIDATION OF A CONSTANT SURFACE SHEAR STRESS IN PARTICLE SALTATION LAYERS

Turbulent flow within a random array of rigid, emergent stems : Laboratory characterization of the drag coefficient

RAS and LES Simulation of the supercritical flow over the waving bed.

Wind Tunnel Experiments and Modelling of Particle-Laden Boundary Layer Flows

Large-scale Computation of the Pump-Turbine Rotating Stall

Evaluation of subgrid-scale models in large-eddy simulation of flow past a two-dimensional block

Forced reattachment in separated flows: a variational approach to recirculation length reduction

A New Sensor Platform for Investigating Turbulence in Stratified Coastal Environments

Edge states for the turbulence transition in the asymptotic suction boundary layer