BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Two-phase gravity currents in carbon dioxide sequestration /  Misc
 ible viscous fingering induced by a simple chemical reaction - Madeleine 
 Golding\, DAMTP / Thomas  Gérard\, BPI
DTSTART:20111020T103000Z
DTEND:20111020T113000Z
UID:TALK33596@talks.cam.ac.uk
CONTACT:Helen Mawdsley
DESCRIPTION:*Two-phase gravity currents in carbon dioxide sequestration*\n
 \nThe effect of capillary forces on the propagation of two-phase gravity c
 urrents is investigated analytically and numerically\, motivated by situat
 ions arising in the geological storage of carbon dioxide (CO2)\, as well a
 s other areas such as groundwater hydrology. In such settings\, a fluid in
 vades a porous medium saturated with an immiscible second fluid of differe
 nt density and viscosity. The action of capillary forces in the porous med
 ium results in spatial variations of the saturation of the two fluids with
 in the current. The local saturation is determined by the vertical balance
  between capillary and gravitational forces\, known as gravity-capillary e
 quilibrium. Gradients in the hydrostatic pressure along the current drive 
 fluid flow in proportion to the saturation-dependent relative permeabiliti
 es. The effect of this on the propagation of axisymmetric\, two-phase grav
 ity currents is discussed and comparison drawn with data from the CO2 sequ
 estration site at Sleipner.\n\n_Madeleine Golding\, DAMPT\, University of 
 Cambridge_\n\n*Miscible viscous fingering induced by a simple chemical re
 action*\n\nViscous fingering 
VF is a hydrodynamical instability that oc
 curs in porous media when a less viscous fluid displaces a more viscous o
 ne. We investigate here numerically how such an instability can be trigger
 ed by a simple A+B→C reaction when a solution of one reactant is displac
 ing linearly a miscible solution of another reactant of same viscosity pro
 ducing a more viscous product C at the interface.\n\n_Thomas Gérard\, BP 
 Institute\, University of Cambridge_\n\n
LOCATION:Open Plan Area\, BP Institute\, Madingley Rise CB3 0EZ
END:VEVENT
END:VCALENDAR