Session A15: Rayleigh-Benard Convection I: Instability and Oscillations
8:00 AM–9:57 AM, Sunday, November 20, 2011
Room: 318
Chair: Amir Riaz, University of Maryland
Abstract ID: BAPS.2011.DFD.A15.3
Abstract: A15.00003 : High Rayleigh number porous convection
8:26 AM–8:39 AM
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Abstract 
Authors:
Duncan Hewitt
(DAMTP, University of Cambridge)
John Lister
(DAMTP, University of Cambridge)
Jerome Neufeld
(DAMTP, University of Cambridge)
Convective flow in porous media undergoes a transition around
Rayleigh number $Ra = 1300$, from predominantly large-scale
(quasi-) periodic rolls to vigorous columnar exchange flow driven
by unsteady plume formation in boundary layers. The dynamics of
these structures determine the flux of heat or solute through the
system, as described by the Nusselt number $Nu$. This is of
particular interest for understanding how convection affects the
rate of dissolution of sequestered CO$_2$ in a saline aquifer.
High resolution 2D numerical simulations of porous media
Rayleigh-Benard convection are presented, which show that, for
$2000
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.DFD.A15.3