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What is happening in “Dust Devil”?

April 26, 2017dust devil happening

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What is happening in “Dust Devil”?

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In “Dust Devil” you spin the propeller to create a vortex in the center of the tank. The vortex sweeps up fine particles of sand into the swirling whirlpool. When you stop turning the handle the vortex dissipates and releases the particles. You can watch the sand slowly drift and settle out of the solution, just as dirt particles are released by desert dust devils.