Abstract
Ultrafast magnetic resonance imaging, employing spiral reciprocal space sampling and compressed sensing image reconstruction, is used to acquire velocity maps of the liquid phase in gas-liquid multiphase flows. Velocity maps were acquired at a rate of 188 frames per second. The method enables quantitative characterization of the wake dynamics of single bubbles and bubble swarms. To illustrate this, we use the new technique to demonstrate the role of bubble wake vorticity in driving bubble secondary motions, and in governing the structure of turbulence in multiphase flows.
- Received 27 February 2012
DOI:https://doi.org/10.1103/PhysRevLett.108.264505
© 2012 American Physical Society
Synopsis
Bubbles Leave Trouble in Their Wake
Published 28 June 2012
Researchers have developed a new method of magnetic resonance imaging that can track the turbulent flow that swirls around moving bubbles.
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