Loading...

Generation of Voronoi grid based on vorticity for coarse-scale modeling of flow in heterogeneous formations

Evazi, M ; Sharif University of Technology | 2010

519 Viewed
  1. Type of Document: Article
  2. DOI: 10.1007/s11242-009-9458-2
  3. Publisher: 2010
  4. Abstract:
  5. We present a novel unstructured coarse grid generation technique based on vorticity for upscaling two-phase flow in permeable media. In the technique, the fineness of the gridblocks throughout the domain is determined by vorticity distribution such that where the larger is the vorticity at a region, the finer are the gridblocks at that region. Vorticity is obtained from single-phase flow on original fine grid, and is utilized to generate a background grid which stores spacing parameter, and is used to steer generation of triangular and finally Voronoi grids. This technique is applied to two channelized and heterogeneous models and two-phase flow simulations are performed on the generated coarse grids and, the results are compared with the ones of fine scale grid and uniformly gridded coarse models. The results show a close match of unstructured coarse grid flow results with those of fine grid, and substantial accuracy compared to uniformly gridded coarse grid model
  6. Keywords:
  7. Heterogeneous porous media ; Vorticity-based gridding ; Coarse grid ; Gridding ; Unstructured grid ; Upscaling ; Porous materials ; Mesh generation ; Accuracy assessment ; Channel flow ; Computer simulation ; Flow modeling ; Flow structure ; Permeability ; Porous medium ; Single-phase flow ; Two phase flow ; Vorticity
  8. Source: Transport in Porous Media ; Volume 83, Issue 3 , Oct , 2010 , Pages 541-572 ; 01693913 (ISSN)
  9. URL: http://link.springer.com/article/10.1007/s11242-009-9458-2