Loading...

Random walk simulation of miscible flow through heterogeneous 2D porous media considering dispersion tensor

Fayazi, A ; Sharif University of Technology | 2015

762 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.ces.2015.03.071
  3. Publisher: Elsevier Ltd , 2015
  4. Abstract:
  5. Most of numerical approaches describing the behavior of miscible displacement in porous media through the solution of advection-dispersion equation suffer from numerical dispersion. Random Walk (RW) method is a good candidate to overcome this problem especially in heterogeneous media. In addition, how treating dispersion coefficient as a tensor might affect the accuracy of RW simulation results is not well understood. Here, a RW model was developed and used for simulating miscible displacement experiments performed on heterogeneous micromodels including single fracture/flow barrier. Dispersion coefficient was treated as a tensor and a hybrid scheme was used for velocity interpolation. The transient concentration and production data were used for estimation of the diffusion coefficient, longitudinal and transversal dispersivity by fitting the model results to the experimental data. Well match observed between model results and experimental data indicates that RW is an accurate method for simulating miscible displacements by capturing the irregularity of the saturation profiles
  6. Keywords:
  7. Diffusion ; Porous materials ; Random processes ; Solute transport ; Tensors ; Dispersion tensors ; Heterogeneous porous media ; Miscible displacement ; Random Walk ; Simulation ; Dispersions
  8. Source: Chemical Engineering Science ; Volume 132 , August , 2015 , Pages 81-92 ; 00092509 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0009250915002705