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18-22 June 2006 Copenhagen, Denmark
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An ELLAM approximation for advective-dispersive transport with nonlinear equilibrium and nonequilibrium sorption
We consider an Eulerian-Lagrangian localized adjoint method
    (ELLAM) applied to nonlinear model equations governing solute
    transport and sorption in porous media. Solute transport in the
    aqueous phase is modeled by standard advection and hydrodynamic
    dispersion, while two types of solid phase are distinguished --- a
    fraction which achieves equilibrium with the aqueous phase
    quickly, and another which does not. The rapidly sorbing fraction
    is modeled using a local equilibrium assumption, while a
    first-order rate expression is used for the slowly sorbing
    fraction.  The presence of both equilibrium and non-equilibrium
    sorption can be challenging for Eulerian-Lagrangian methods, since
    information may propagate along different characteristic
    directions in the space-time domain.

    Here, we present an implementation of a finite element ELLAM
    (FE-ELLAM) discretization in both fully coupled and operator-split
    frameworks for the reactive transport model. We then evaluate our
    method for several test problems spanning a range of auxiliary and
    physical conditions and compare its performance to more standard
Id: 226
Place: Copenhagen, Denmark
Ingeniørhuset, Kalvebod Brygge 31-33, 1780 Cph. V

Room: Room 101
Starting date:
21-Jun-2006   09:35
Duration: 20'
Primary Authors: Matthew Farthing (University of North Carolina)
Christopher Kees (US Army Corps of Engineers Engineer Research and Development Center)
Thomas Russell (University of Colorado at Denver)
Cass Miller (University of North Carolina)
Presenters: Matthew Farthing
Material: paper Paper
Included in session: General
Included in track: General

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