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| Titel |
Reactive flow simulations: one-to-one comparison with experiments |
| VerfasserIn |
Jan Ludvig Vinningland, Amélie Neuville, Janne Pedersen, Espen Jettestuen, Dag Kristian Dysthe, Aksel Hiorth |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250099971
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| Publikation (Nr.) |
 EGU/EGU2014-15831.pdf |
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| Zusammenfassung |
| Direct in-situ observations of structural changes in the pore space of
porous rocks during reactive flow provide valuable insights into the
pore scale mechanisms that govern mineral growth, changes in wetting
properties and increased oil recovery. We present simulations of
single-phase reactive flow in micrometer sized channels in a calcite
(CaCO3) crystal and compare mineralogical and geometrical changes in
the numerical results to experimental in-situ observations made with
the same flow geometry and reactive fluids. This enables a rigorous
test of the numerical model and a method for determining kinetic rate
constants that will be used in simulations of reactive flow in chalk
geometries. The numerical model is a lattice Boltzmann model (LBM)
that moves a set of chemical basis species through the pore space by
advection and diffusion. A chemical solver with general kinetic
expressions is coupled to the LBM via mass fluxes at the solid-fluid
interface. The mineralogy of the solid is described by scalar fields,
each representing a mineral phase. The rate of dissolution or
precipitation of a mineral depends on the local chemical
disequilibrium and on a kinetic rate constant specific to each
mineral. |
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