DEVELOPMENT OF MINCS CODE FOR EVALUATION OF 2-PHASE FLOW MODELS

This report describes the development of the one-dimensional two-phase flow characteristics analysis code, MINCS. The MINCS has been develop ed at JAERI (Japan Atomic Energy Research Institute) to provide a comp utational tool for analyzing not only physical phenomena of two-phase flows but also numerical phenomena in two-phase flow analyses. In MINC S, nine types of two-phase flow models, ranging from a basic two-fluid nonequilibrium (2V2T) model to a simple homogeneous equilibrium (1V1T ) model, can be treated under the same numerical solution method. The numerical technique is based on the implicit finite difference method to enhance the numerical stability. The code structure is highly modul arized, so that new constitutive relations and correlations can be eas ily implemented into the code and hence evaluated. A flow pattern can be fixed regardless of flow conditions, and state equations or steam t ables can be selected or supplied by users. It is, therefore, easy to solve physical or numerical benchmark problems.