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SUMMARY:Harnessing Computing for Societal Challenges – the Importance of
  Multiphase Flows - Damir Juric\, Churchill College &amp\; CNRS LISN Paris
DTSTART:20220131T130000Z
DTEND:20220131T140000Z
UID:TALK169415@talks.cam.ac.uk
CONTACT:Prof. Jerome Neufeld
DESCRIPTION:The ability to predict the behaviour of multiphase flows accur
 ately\, reliably\, and efficiently addresses an absolutely vast array of m
 ajor challenges of societal\, economic and scientific importance. Flows wi
 th multiple interacting fluid phases give rise to phenomena at liquid-gas 
 interfaces whose deep and quantitative understanding is crucial for solvin
 g global challenges such as ocean-atmosphere greenhouse gas exchange\, cap
 ture or storage of CO2\, aerosol and cloud physics and water desalination 
 and treatment. Such real and varied systems are necessarily quite complex\
 , often turbulent\, multiphase flows where mass (chemical species)\, momen
 tum and energy (heat) are exchanged across\, usually contaminated\, surfac
 tant-laden interfaces between phases which may themselves exhibit non-Newt
 onian rheology or even change phase. In health\, energy and engineering ap
 plications\, such flows are central to nearly every processing and manufac
 turing technology such as microfluidics lab-on-a-chip for biomedicine\, mi
 xing\, scrubbing\, refining and distillation in chemical processes\, atomi
 sation\, jets and sprays in combustion\, surfactant enhanced flows in oil-
 water petroleum processes and detergents\, bubble formation in glass\, cer
 amics or steel production\, alloy solidification in materials processing a
 nd boiling of water to steam for fossil fuel and nuclear energy production
  just to name a few.  In addition\, one of the most crucial aspects of the
 se systems is the two-way coupled interaction of fluid flows with intricat
 ely designed solid structures such as impeller mixers\, atomisation nozzle
 s or distillation packings upon which dynamic fluid contact lines evolve.\
 n\nIn real systems\, the above complexities are the rule not the exception
  and the crucial commonality is the interface\, whether it be between liqu
 id\, gas or solid.  I will present an overview and some examples of our wo
 rk towards simulating some of these interfacial flows to a high degree of 
 precision in order to try to bring them into the domain of what is computa
 tionally achievable.
LOCATION:MR5\, CMS
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