![]() ![]() ![]() Comparison between the calculated results and the experimental data are generally favorable. Several test calculations were performed to assess the accuracy and applicability of the TRANSG-N models. The steady-state and transient steam generator models developed in the present study are incorporated into the TRANSG-N computer code. The heat flux terms for the liquid and vapor equations are obtained through a proposed energy partition model which accounts for the nonequilibrium effects of both vapor and liquid, and satisifies the constraints in the steady-state limit. The finite-difference form of the nonequilibrium drift-flux equations is obtained through the staggered mesh structure of the implicit continuous-fluid Eulerian (ICE) scheme. The conservation equations are derived in a form that allows for easy comparison among various two-phase flow more ยป models. The liquid and vapor equations are derived by combining the continuity equation with energy equation for each phase. The five fluid conservation equations used in the formulation include the continuity, momentum, and energy equations for the mixture and the liquid and vapor equations. The nonequilibrium drift-flux model is based on a one-dimensional, separated-flow, single-channel formulation. This thesis describes the development and verification of a nonequilibrium drift-flux steam generator model to simulate and analyze various transients encountered in nuclear plants utilizing light water reactors. ![]()
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