Tag Archives: cohesion

granular smoothie

For the last 11 years and following an original idea of the Nobel Prize Pierre-Gilles de Gennes, the ESPGG has been promoting researchers from Paris and outside by mean of plenary experimental conferences. More than 100 scientists have so presented … Continue reading

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Building sandcastles grain by grain

From sugar poured into a bowl to tons of grains discharge processes in industry, a peculiar feature of granular materials emerges : the formation of a pile. When the grains are not cohesive, only the friction and the grain geometry … Continue reading

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Wet sand flows better than dry sand

As any child knows, the best way to build a sandcastle is to use wet sand. Wet grains stick together due to capillary forces [1]. A castle made from dry sand will collapse under its own weight. However, we have demonstrated that, … Continue reading

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Powder rheometry

In a strong collaboration with the chemistry department within the APTIS technological platform, the GRASP has developed scientific instruments for characterizing the powder properties such as flowability, rheology, cohesion index, Carr index, and tap density measurements. Four instruments are now distributed … Continue reading

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Relative Humidity matters

Although experimentalists suspect some effect of the Relative Humidity (RH) on the physical properties of granular materials, almost no author reports the value of RH besides his data. This missing information is however crucial, as explained in our last paper … Continue reading

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