Method for modeling transport of particles in realistic porous networks: application to the computation of NMR flow propagators.

Method for modeling transport of particles in realistic porous networks: application to the computation of NMR flow propagators. Research Abstract Details 

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Method for modeling transport of particles in realistic porous networks: application to the computation of NMR flow propagators. Abstract Text:

Guillemette Picard,Kurt Frey,Guillemette Picard,Kurt Frey,

We model the transport of particles present in a fluid steadily flowing through a porous medium. The porous medium is described by a representative three-dimensional network. The particles are subjected to advection by the flow and to thermal diffusion. We propose to calculate their trajectories with the continuous time random walk framework. This enables us to efficiently sample disordered networks with realistic topology. The method proposed in this paper is general and can be adapted to model dispersion of tracers. It is applied here to simulate the measurement of the flow propagator [Formula: see text] which is defined as the ensemble density distribution of tracer displacements [Formula: see text], in a given time interval delta t. It can be extracted from pulsed magnetic field gradient spin echo NMR experiments carried out on porous media while fluid is flowing. Preliminary numerical results show good qualitative agreement with experiments.

Method for modeling transport of particles in realistic porous networks: application to the computation of NMR flow propagators. Publishing Authors By Initials

G Picard,K Frey,G Picard,K Frey,

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Method for modeling transport of particles in realistic porous networks: application to the computation of NMR flow propagators. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Physical review. E, Statistical, nonlinear, and so

VOLUME: 75

Page Numbers: 066311

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ISSN: 1539-3755

DAY: 22

MONTH: 06

YEAR: 2007

Method for modeling transport of particles in realistic porous networks: application to the computation of NMR flow propagators. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Method for modeling transport of particles in realistic porous networks: application to the computation of NMR flow propagators.

AFFILIATION: Schlumberger Doll Research, 1 Hampshire street, Cambridge, Massachusetts 02139, USA.

Country: United States

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MEDLINETA: Phys Rev E Stat Nonlin Soft Ma

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