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Related Experiment Videos

Tracer dispersion in a percolation network with spatial correlations

Makse1, Andrade, Eugene Stanley H

  • 1Departamento de Fisica, Universidade Federal do Ceara, 60451-970 Fortaleza, Ceara, Brazil and Schlumberger-Doll Research, Old Quarry Road, Ridgefield, Connecticut 06877 and Center for Polymer Studies and Physics Department, Boston University, Bos.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|October 25, 2000
PubMed
Summary

This study examines tracer transport in porous media, revealing a shift from subdiffusion to enhanced diffusion as flow rates increase. These findings are crucial for understanding fluid dynamics in complex geological formations.

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Area of Science:

  • Fluid Dynamics
  • Porous Media Physics
  • Transport Phenomena

Background:

  • Understanding solute transport in porous media is vital for applications like groundwater remediation and oil recovery.
  • Porous media exhibit complex geometries that significantly influence fluid flow and solute dispersion.
  • Spatial correlations in porous media can lead to anomalous transport behaviors.

Purpose of the Study:

  • To investigate the transport properties of a neutral tracer in a carrier fluid within percolation-like porous media.
  • To analyze the influence of convection and spatial correlations on tracer movement.
  • To identify the different transport regimes based on the Peclet number.

Main Methods:

  • Numerical solution of the Navier-Stokes and continuity equations to obtain the velocity field.

Related Experiment Videos

  • Modeling convection as a key component of mass transport.
  • Statistical analysis of tracer properties under varying flow conditions.

    • Main Results:

    • Tracer transport exhibits a transition from subdiffusion at low Peclet numbers to enhanced diffusion at high Peclet numbers.
    • The velocity field within the pore space dictates the convective transport of the tracer.
    • Spatial correlations within the porous media influence the observed diffusion regimes.

    Conclusions:

    • The study successfully characterizes the transition in tracer transport regimes.
    • Enhanced diffusion at high Peclet numbers suggests increased mixing and spreading.
    • The findings provide insights into solute transport mechanisms in complex, correlated porous environments.