Comparison of Frameworks for Comparison of Frameworks for Next Generation Multiphase Flow Next Generation Multiphase Flow Solver, MFIX: Solver, MFIX: A Group Decision A Group Decision - - Making Exercise Making Exercise A. Gel, ( A. Gel, ( Aeolus Aeolus Research, Inc.) Research, Inc.) S. S. Pannala Pannala , (Oak Ridge National Laboratory) , (Oak Ridge National Laboratory) M. M. Syamlal Syamlal and T. J. O and T. J. O’ Brien (National Energy Technology Laboratory) Brien (National Energy Technology Laboratory) E. Gel (Arizona State University) E. Gel (Arizona State University)