EXPERIMENTAL AND THEORETICAL INVESTIGATION OF MULTIPHASE FLOW IN FRACTURED POROUS MEDIA SUPRI TR 116 By Edgar René Rangel Germán Louis M. Castanier Serhat Akin June 1999 Work Performed Under Contract No. DE-FG22-96BC14994 Prepared for U.S. Department of Energy Assistant Secretary for Fossil Energy Thomas Reid, Project Manager National Petroleum Technology Office P.O. Box 3628