An integrated relap5-3d and multiphase cfd code system utilizing a semi-implicit coupling technique Original Research Article

An integrated code system consisting of relap5-3d and a multiphase Computational Fluid Dynamics (cfd) program has been created through the use of a generic semi-implicit coupling algorithm. Unlike previous cfd coupling work, this coupling scheme is numerically stable provided the material Courant limit is not violated in relap5-3d or at the coupling locations. The basis for the coupling scheme and details regarding the unique features associated with the application of this technique to a four-field cfd program are presented. Finally, the results of a verification problem are presented. The coupled code system is shown to yield accurate and numerically stable results.