The Behaviour of Multiphase Plumes with Chemical Reaction

Add to your list(s) Download to your calendar using vCal

• Dr S Cardoso, Dept. of Chemical Engineering, University of Cambridge
• Thursday 15 June 2006, 16:00-17:00
• Mott Seminar Room, Cavendish Laboratory, Department of Physics.

If you have a question about this talk, please contact Stephen Walley.

Multiphase plumes may result from a concentrated and continuous release of buoyancy in the form of small bubbles, droplets or particles. Here, we present an experimental and theoretical study of the behaviour of such expanding plumes. Laboratory measurements using Particle Image Velocimetry are combined with scaling and numerical results. It is found that mixing and dispersal in reactive plumes is fundamentally different to that found in plumes without reaction; this difference in behaviour is caused by buoyancy-induced changes in turbulence and fluid flowing in the opposite direction to that of the bulk plume flow. Cases are observed which result in collapsing or imploding plumes; we use our model to propose a criterion which predicts this occurrence, and verify it experimentally for a wide range of reaction rates and release conditions. Implications of our results for deep ocean CO2 plumes, volcanic eruptions and buoyancy-driven cloud formations are explored.

This talk is part of the PCS Fracture and Shock Physics series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Featured lists
• ME Seminar
• Mott Seminar Room, Cavendish Laboratory, Department of Physics
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• School of Physical Sciences
• Thin Film Magnetic Talks

Note that ex-directory lists are not shown.