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HomePhysicsPuddle Depth Issues for Stalagmites – FYFD

Puddle Depth Issues for Stalagmites – FYFD


Stalagmites grow from the floor of a cavern.

In a cave, mineral-rich water drips from the ceiling, spreading ions used to construct stalagmites. A latest examine considers how the depth of a pool impacts the droplet’s splash and the way materials from the droplet spreads. The authors discovered a number of situations that change broadly relying on pool depth.

A droplet falling into a shallow pool creates a splash that quickly breaks up into droplets. This flings the red droplet material in many directions.
A droplet falling right into a shallow pool creates a splash that rapidly breaks up into droplets. This flings the purple droplet materials in lots of instructions.

A drop falling right into a shallow pool had a splash that rapidly broke up into droplets (above). By dyeing the pool inexperienced and the droplet purple, they might monitor the place the droplet’s materials wound up. The spray of small droplets carried fluid far, however the principle level of affect had a robust focus of the drop’s fluid.

With a deeper pool, the drop's impact creates a thick crown splash that collapses in on itself. The drop's fluid is quickly mixed into the pool.
With a deeper pool, the drop’s affect creates a thick crown splash that collapses in on itself. The drop’s fluid is rapidly combined into the pool.

In distinction, a deeper pool despatched up a thick-walled splash crown that collapsed in on itself. This droplet’s materials noticed numerous mixing with the pool, however solely close to the purpose of affect. From their work, the authors concluded that fashions of stalagmite progress ought to incorporate pool depth with a purpose to seize how minerals truly focus and transfer. (Picture credit score: cave – H. Roberson, others – J. Parmentier et al.; analysis credit score: J. Parmentier et al.; through APS Physics; submitted by Kam-Yung Soh)



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