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SUMMARY:Dynamics of fluid-filled gelatin cracks - Onno Bokhove\, Departmen
 t of Mathematics\, University of Twente
DTSTART:20081106T113000Z
DTEND:20081106T123000Z
UID:TALK14272@talks.cam.ac.uk
CONTACT:Dr C. P.  Caulfield
DESCRIPTION:\nI  will present preliminary laboratory experiments and model
 ling  results on fluid-rock-tunnel interactions\, with the aim to  underst
 and key physical processes in geological and industrial applications. A hi
 erarchy of idealized laboratory and numerical  experiments will be investi
 gated\, using gelatine as proxy for rock  and water(/glycerine) as a proxy
  for magma. The mathematical model  consists of a (known) coupled model wi
 th linear elasticity equations  for the rock and width averaged and simpli
 fied Stokes’ equations for  the fluid\, with fixed\, free surface and in
 flow boundary conditions.  Associated advanced two- and three-dimensional 
 finite element  methods will be sketched.\n\nThe laboratory experiments ar
 e used to validate the numerical models  by systematically measuring the d
 ependence on the dike shape (along  the major axis and in the vertical) an
 d “magma” discharge in the  steady state\, as function of hydrostatic 
 head (“overpressure”) and  fluid (“magma”) viscosity. In addition 
 we have determined the  elastic modulus and fracture toughness of the gela
 tine in  compression and pressure tests to fix the parameters in the coupl
 ed  model.
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
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