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Startseite > Séminaires > Archives séminaires > Séminaires 2015 > Lundi 9 novembre 2015 : Caroline Cohen "Erosion patterns on dissolving surfaces".

Lundi 9 novembre 2015 : Caroline Cohen "Erosion patterns on dissolving surfaces"

Sauf mention contraire, les séminaires et les soutenances se déroulent à 11h30 en salle 454A du bâtiment Condorcet.

Le séminaire aura lieu en 454A, à 11h30

"Erosion patterns on dissolving surfaces"

We investigate erosion by dissolution processes. We perform laboratory experiments on hard caramel bodies, which dissolve on a short timescale, compared to geological material such as limestone. We put a block of caramel, tilted from the horizontal, in a water tank without flow. The dissolution syrup, which is denser than pure water, sinks and the flow detaching from the surface creates patterns underneath the caramel block. These patterns result from the coupled dynamics of the flow detach ng and the eroding surface and are reminiscent of scallops observed in the walls of phreatic cave passages. We investigate the mechanisms of formation of these structures and their evolution depending on several parameters such as the fluid density or the flow velocity. We finally parallel the formation of patterns on melting iceberg.

Contact : Équipe séminaires / Seminar team - Published on / Publié le 5 novembre 2015

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