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Pore Scale

Pore Scale. Pore-scale. Contributed by: Keller, A. A., M. J. Blunt and P. V. Roberts (1997) Auset, M., and Keller, A. A. (2004) Sirivithayapakorn, S. and Keller, A. A. (2004). Pore Scale. Purpose of the model Demonstrate modeling in COMSOL Multiphysics Share an interesting example

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Pore Scale

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  1. Pore Scale

  2. Pore-scale Contributed by: Keller, A. A., M. J. Blunt and P. V. Roberts (1997) Auset, M., and Keller, A. A. (2004) Sirivithayapakorn, S. and Keller, A. A. (2004)

  3. Pore Scale Purpose of the model • Demonstrate modeling in COMSOL Multiphysics • Share an interesting example Model definition • Zoom in on flow within a rock at the pore scale • Navier-Stokes equations to get within-pore velocities

  4. Pore Scale – Equations p = pressure u = vector of directional velocities h = dynamic viscosity r = fluid density

  5. 320 mm 640 mm

  6. Pore Scale

  7. Pore Scale In-pore velocity profile

  8. Pore Scale Boundary integration to find Darcy velocity -> permeability Outflow = 1426mm2 s-1 Length y = 320mm Length x = 640mm q = 1426/320mm s-1 = k r g h-1(pout – pin)/Length x -> k = 4 x 10-13 m2

  9. Pore Scale Forces in x and y come from Stokes law Particle is given unit mass Starting points along flow inlet Initial velocity is fluid velocity instead for this movie

  10. References • Keller, A. A., M. J. Blunt and P. V. Roberts (1997). Micromodel observation of the role of oil layers on multiphase flow. Transport in Porous Media 26: 277-297. • Auset, M. and Keller, A. A. (2004). Pore-scale processes that control dispersion of colloids in saturated porous media. Water Resources Research, 40 (3): W03503, 10.1029/2003WR002800. • Sirivithayapakorn, S. and Keller, A. A. (2003). Transport of colloids in saturated porous media: A pore-scale observation of the size exclusion effect and colloid acceleration. Water Resources Research, 39 (4): 1109.

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