BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Modelling salt fingering staircases in 1 dimension - Paul Edward  
 Pružina (Isaac Newton Institute)
DTSTART:20240117T100000Z
DTEND:20240117T104500Z
UID:TALK208486@talks.cam.ac.uk
DESCRIPTION:The phenomenon of staircase formation in double-diffusive conv
 ection has attracted much interest\, with several theories proposed for th
 e mechanism leading to layering. By drawing parallels between the popular 
 &gamma\;-instability theory\, and the Phillips effect (which leads to laye
 ring in stirred stratified fluids)\, we propose a framework that encapsula
 tes both double-diffusive and stirred layer formation. With a three-compon
 ent system for temperature\, salinity and kinetic energy\, a regularised l
 inear stability is predicted\, with a well-defined preferred wavenumber.We
  present a system of one-dimensional equations derived from a horizontal a
 veraging process\, for which the stability analysis predicted layering for
  a bounded range of parameter values in the salt-fingering regime. Nonline
 ar solutions show that an initially unstable linear buoyancy gradient deve
 lops into layers\, which proceed to merge through a process of stronger in
 terfaces growing at the expense of weaker ones. Our results indicate that 
 these mergers are responsible for the characteristic increase of buoyancy 
 flux through thermohaline staircases.\n&nbsp\;
LOCATION:Seminar Room 1\, Newton Institute
END:VEVENT
END:VCALENDAR