Tag Archives: Soft matter

Unjammed Emulsions Collapse to Liquids

An emulsion’s rigidity disappears when the droplets’ random thermal motion overcomes the confining pressure that binds them.  Continue reading

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Some Granular Columns Weigh Too Much

Particles packed inside a cylinder can experience a downward force from the walls, resulting in an apparent weight increase.  Continue reading

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Ants know the secret to avoiding traffic jams

In a confined environment, ants divide labor to optimize nest excavation. Continue reading

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When the ants go marching in

Ants in a confined environment divide labor to optimize excavation. Continue reading

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Size-sorted sand creates uncommon length scale in windblown formations

A combination of grain-size distribution and critical wind speed is responsible for megaripples. Continue reading

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Friction remembers its past

Experiments show that frictional interfaces age and bounce back. Continue reading

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How to build megaripples out of sand

Sorting of grains by steady winds produces rare formations larger than ripples but smaller than dunes. Continue reading

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