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SUMMARY:Application of the combined SPH and DEM techniques to simulate rea
 listic Beer - Dr Mahesh Prakash\, Senior Research Scientist\, CFD Stream\,
  CSIRO Mathematical and Information Sciences
DTSTART:20071001T140000Z
DTEND:20071001T143000Z
UID:TALK8044@talks.cam.ac.uk
CONTACT:Vanessa Blake
DESCRIPTION:A discrete particle based method capable of creating very real
 istic animations of bubbles in fluids is presented. It allows for the gene
 ration (nucleation) of bubbles from gas dissolved in the fluid\, the motio
 n of the discrete bubbles including bubble collisions and drag interaction
 s with the liquid which could be undergoing complex free surface motion\, 
 the formation and motion of coupled foams and the final dissipation of bub
 bles. This allows comprehensive simulations of dynamic bubble behavior. Th
 e underlying fluid simulation is based on the mesh-free Smoothed Particle 
 Hydrodynamics method. Each particle representing the liquid contains an am
 ount of dissolved gas. Gas is transferred from the continuum fluid model t
 o the discrete bubble model at nucleation sites on the surface of solid bo
 dies. The rate of gas transport to the nucleation sites controls the rate 
 of bubble generation\, producing very natural time variations in bubble nu
 mbers. Rising bubbles also grow by gathering more gas from the surrounding
  liquid as they move. This model contains significant bubble scale physics
  and allows\, in principle\, the capturing of many important processes tha
 t cannot be directly modeled by traditional methods. The method is used he
 re to realistically animate the pouring of a glass of beer\, starting with
  a stream of fresh beer entering the glass\, the formation of a dense clou
 d of bubbles\, which rise to create a good head as the beer reaches the to
 p of the glass.
LOCATION:Board Room\, Department of Chemical Engineering
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