Publications de Steve Cochard | EPFL Graph Search

Experimental investigation of the spreading of viscoplastic fluids on inclined planes

We report experimental results related to the dam-break problem for viscoplastic fluids. Using image processing techniques, we were able to accurately reconstruct the free-surface evolution of fixed volumes of fluid suddenly released a plane. We used Carbo ...

Elsevier2009

The dam-break problem for Herschel-Bulkley viscoplastic fluids down steep flumes

Christophe Ancey, Steve Cochard

In this paper we investigate the dam-break problem for viscoplastic (Herschel- Bulkley) fluids down a sloping flume: a fixed volume of fluid initially contained in a reservoir is released onto a slope and flows driven by gravitational forces until these fo ...

2009

The dam-break problem for viscous fluids in the high-capillary-number limit

Christophe Ancey, Steve Cochard, Nicolas Andreini

Experiments were undertaken to investigate dam-break flows where a finite volume of highly viscous fluid (glucose with viscosity μ ≈ 350 Pa s) maintained behind a lock gate was released into a horizontal or inclined flume. The resulting sequence of flow-de ...

Cambridge University Press2009

Tracking the free surface of time-dependent flows: Image processing for the dam-break problem

Christophe Ancey, Steve Cochard

The dam-break problem (i.e., the sudden release of a given volume of fluid down a slope) has attracted a great deal of attention from mechanicians and physicists over the past few years, with particular interest devoted to the free-surface profile and the ...

Springer Verlag2008

Existence and features of similarity solutions for non-Boussinesq gravity currents

Christophe Ancey, Steve Cochard, Martin Rentschler, Sébastien Wiederseiner

In this paper, the flow dynamics of gravity currents on a horizontal plane is investigated from a theoretical point of view by seeking similarity solutions. The current is generated by unleashing a varying volume of heavy fluid within an ambient fluid of m ...

2007

Measurements of time-dependent free-surface viscoplastic flows down steep slopes

Steve Cochard

The objective of this thesis was to increase our understanding of gravity-driven geophysical flows by developing a new platform to simulate avalanches of fluid in the laboratory. To simulate flow avalanches in the laboratory, we created a unique experiment ...

EPFL2007

Steve Cochard

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Experimental investigation of the spreading of viscoplastic fluids on inclined planes

The dam-break problem for Herschel-Bulkley viscoplastic fluids down steep flumes

The dam-break problem for viscous fluids in the high-capillary-number limit

Tracking the free surface of time-dependent flows: Image processing for the dam-break problem

Existence and features of similarity solutions for non-Boussinesq gravity currents

Measurements of time-dependent free-surface viscoplastic flows down steep slopes

Front dynamics of a water surge at high Reynolds number: similarity solutions to the Saint-Venant equations

Front dynamics of a water surge at high Reynolds number: Similarity solutions to the Saint-Venant equations

Accurate measurements of free-surface in the dam-break problem

Understanding avalanches

Experimental investigation of the spreading of viscoplastic fluids on inclined planes

The dam-break problem for Herschel-Bulkley viscoplastic fluids down steep flumes

The dam-break problem for viscous fluids in the high-capillary-number limit

Tracking the free surface of time-dependent flows: Image processing for the dam-break problem

Measurements of time-dependent free-surface viscoplastic flows down steep slopes

Front dynamics of a water surge at high Reynolds number: similarity solutions to the Saint-Venant equations

Existence and features of similarity solutions for non-Boussinesq gravity currents

Front dynamics of a water surge at high Reynolds number: Similarity solutions to the Saint-Venant equations

Accurate measurements of free-surface in the dam-break problem

Understanding avalanches