Air bubbles in blue-dyed glycerin in a Hele-Shaw cell.

By Thomas Pohlman, Hans Loewenheath and Grant Boerhave for Spring 2013 Team Second.
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A mixture of blue food dye and olive oil injected into olive oil in a Hele Shaw cell fingers in the Saffman Taylor instability at small scale.

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  • […] Air and blue-dyed glycerin squeezed between two glass plates kind curvy, finger-like protrusions. It is a close-up of the Saffman-Taylor instability, a sample created when a much less viscous fluid — right here, air — is injected right into a extra viscous one. When you reverse the scenario and inject glycerin into air, you’ll get no viscous fingers, only a secure, increasing circle. Though you generally come throughout this instability in each day life — like in a cracked smartphone display screen — the foremost motivation for finding out this phenomenon traditionally has been oil and fuel extraction. (Picture credit score: T. Pohlman et al.) […]

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