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SUMMARY:On the propagation of non-isothermal gravity currents in an inclin
 ed porous layer /  Propulsion in Stokes flow -  Will Rayward-Smith\, BP In
 stitute\, University of Cambridge /  Tom Johnson\, University of Birmingha
 m
DTSTART:20111201T113000Z
DTEND:20111201T123000Z
UID:TALK33606@talks.cam.ac.uk
CONTACT:Helen Mawdsley
DESCRIPTION:On the propagation of non-isothermal gravity currents in an in
 clined porous layer\n\nWe consider the buoyancy-driven flow in an inclined
  porous layer which results when fluid of diff\nerent temperature and comp
 osition to that in the reservoir is injected from a horizontal line well. 
 The thermal inertia of the porous matrix leads to a transition in the temp
 erature of the injectate as it spreads from the well and heats up to reser
 voir temperature. Since the buoyancy and viscosity of the injectate change
 s across this thermal transition\, the alongslope characteristic speed of 
 the current also changes. The change in characteristic speed\, combined wi
 th the change in buoyancy across the thermal transition\, leads to a serie
 s of different flow morphologies with the thermally adjusted injectate eit
 her running ahead of or lagging behind the original injectate. We consider
  the implications of the models for several industrial processes including
  geothermal heat recovery\, aquifer thermal storage and CO2 sequestration.
 \n\nWill Rayward-Smith\, BP Institute\, University of Cambridge\n\nPropuls
 ion in Stokes flow\n\nThe swimming of micro-organisms has been a benchmark
  problem in low-Reynolds number flow for the past 60 years. In particular\
 , the study of eukaryotic flagellar motion\, characterised by active bendi
 ng along the tail\, has led to the development of the Resistive Force Theo
 ry and powerful singularity methods based upon the Stokeslet. The motor ap
 paratus of eukaryotic flagella and cilia\, the axoneme\, is one of the mos
 t evolutionarily robust structures in all of nature\, being almost identic
 al in all organisms from single-celled algae to humans. Understanding the 
 complicated fluid-structure interaction by which these motors drive fluid 
 will give invaluable insight into a variety of medical conditions\, from i
 nfertility to situs inversus. I intend to give an overview of a few of the
  current research problems in the area\, along with the methods being used
  to solve them.\n\nTom Johnson\, University of Birmingham\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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