Automaton Simulations of Dispersion in Porous Media |
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Authors: | Yang D. Udey N. Spanos T. J. T. |
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Affiliation: | (1) AMOCO, 708, 700-9 Street S. W,Calgary, Alberta, Canada;(2) Advanced Computing, Alberta Research Council, 6815-8 Street NE, Calgary, Alberta, Canada, T2E 7H7;(3) Department of Physics, University of Alberta, Edmonton, Alberta, Canada, T6G 2J1 |
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Abstract: | A thermodynamic lattice gas (automaton) model is used to simulate dispersion in porous media. Simulations are constructed at two distinctly different scales, the pore scale at which capillary models are constructed and large scale or Darcy scale at which probabilistic collision rules are introduced. Both models allow for macroscopic (pore scale) phase separation. The pore scale models clearly show the effect of pore structure on dispersion. The large scale (mega scale) simulations indicate that when the pressure difference between the displacing phase and displaced phase is properly chosen (representing the average pressure gradient between the phases). The simulation results are consistent with both theoretical predictions and experimental observations. |
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Keywords: | diffusion dispersion miscible automaton |
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