70th Annual Meeting of the APS Division of Fluid Dynamics (November 19, 2017 — November 21, 2017)

V0095: Bubble Absorption by a Superhydrophobic Spring

  • Negar Beheshti Pour, Washington State University
  • David Thiessen, Washington State University
DOI: https://doi.org/10.1103/APS.DFD.2017.GFM.V0095

A slightly stretched stainless steel spring coated with a superhydrophic layer is submerged in water, filled with air, and vented to the atmosphere. Air bubbles contacting the spring are rapidly absorbed (in a few milliseconds). Initial attachment of the bubble to the channel occurs on a roughness element and spreads rapidly (~1 m/s). Bubble collapse is often accompanied by a reentrant jet that can inject water into the channel. These superhydrophobic channels may be useful for phase separation in life support or power systems under the low-gravity conditions of long-duration space missions.

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