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SUMMARY:Virtual Barriers for Horizontal Buoyancy-driven Flows - Daria Fran
 k ( DAMTP)
DTSTART:20230223T113000Z
DTEND:20230223T123000Z
UID:TALK195550@talks.cam.ac.uk
CONTACT:Catherine Pearson
DESCRIPTION:An existing horizontal density stratification in a fluid gives
  rise to buoyancy-driven currents. Such exchange flows between two zones a
 t different densities cause advective transport of mass\, heat\, particula
 tes\, chemical and biological substances\, which often has undesirable con
 sequences for one or both zones. They may occur in a variety of natural an
 d industrial settings\, across a wide range of temporal and spatial scales
 . It is often impossible to stop these buoyancy-driven flows by mechanical
 ly shutting the gates or the doors since this would hinder or obstruct the
  passage of humans\, vehicles or ships. Thus\, alternative mitigation stra
 tegies for reducing the buoyancy-driven exchange flows have been devised. 
 In this talk\, we will consider plane turbulent flows\, such as air curtai
 ns and bubble curtains\, that act as separation barriers between two zones
  at different densities. In particular\, we will discuss the performance o
 f an air curtain in a variety of practical situations and present experime
 ntal and theoretical results for their sealing effectiveness. We will also
  explore the behaviour of a bubble curtain and highlight the similarities 
 and the differences between an air curtain and a bubble curtain.
LOCATION:Open Plan Area\, Institute for Energy and Environmental Flows\, M
 adingley Rise CB3 0EZ
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