 method two set of fractures are considered. The first set named coarse-scale fractures are used to define the coarse model, while another set named fine-scale fractures are only included in the fine-scale model. For comparison an example where the coarse grid is not based on the fractures is considered</p><p>For further details see: "Inexact linear solver for flow in multiscale fractures" T.H. Sandve, E. Keilegavlen and J. M. Nordbotten submittet to Water Resources Research 2013</p><p>Copyright 2011-2012 U