2Pore-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)
3Pore Scale Purpose of the model Demonstrate modeling in COMSOL MultiphysicsShare an interesting exampleModel definitionZoom in on flow within a rock at the pore scaleNavier-Stokes equations to get within-pore velocities
4Pore Scale – Equations p = pressure u = vector of directional velocitiesh = dynamic viscosityr = fluid density
8Pore Scale Boundary integration to find Darcy velocity -> permeabilityOutflow = mm2 s-1Length y = mmLength x = mmq = 1426/320 mm s-1 = k r g h-1 (pout – pin)/Length x-> k = 4 x m2
9Pore Scale Forces in x and y come from Stokes law Particle is given unit massStarting points along flow inletInitial velocity is fluid velocity instead for this movie
10ReferencesKeller, 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: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, /2003WRSirivithayapakorn, 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.