Tag Archives: microgravity

The way antifoaming agents act

In many industrial processes, foams are unwanted products. In order to destroy them, antifoaming agents are used… without really knowing how they act. Those antifoaming agents are dispersions of small particles, which need to break foam films efficiently. We have … Continue reading

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How to handle granulates in space ?

The peculiar behavior of granular materials in microgravity is a hard physics problem. In the dilute case, granular gases loose kinetic energy and may form clusters. In order to avoid this “cooling effect”, mechanical energy should be continuously injected in … Continue reading

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Maxwell’s demon in space

In our last article published in Phys. Rev. E, we show how dynamical clustering triggers the Maxwell’s demon in microgravity experiments. In the framework of the ESA SpaceGrains project, we realized numerical simulations in order to test the granular Maxwell’s … Continue reading

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Discharge of a silo in hypergravity

Last year, we performed a series of experiments to investigate the flow of an assembly of non-cohesive spherical grains in high gravity conditions. We studied the flow of beads out of a  silo that was loaded in one of the … Continue reading

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Zero free parameter for zero gravity

When grains are continuously driven in a closed cell, inelastic collisions may lead the system into a dense cluster which coexists with a granular gas. Although observed 12 years ago in microgravity experiments [1], the dynamical clustering of grains was … Continue reading

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