Development of multi components and multi phase numerical method with chemical reaction; Examination of Multi phase numerical method

Takata, Takashi; Yamaguchi, Akira

In the steam generator using liquid sodium, Water intensely reacts with sodium when it leaked out from a heat tube. It is important to evaluate an influence of the sodium-water reaction to, such as, heat tubes surrounding a leakage and the generator. In the past, evaluations of this phenomenon have been carried out by experiments. However it is difficult to extrapolate an effect by configuration of a heat tube or change of operating condition, etc. and experiments using sodium need incredible cost. Then quantification by a numerical method is desirable. To develop a multi component and multi phase numerical method with chemical reaction, fundamental models of a multi phase numerical method are selected with organizing previous works in this paper, as follows Fluid model : multi fluid model Pressure model : one pressure model Solving method : HSMAC (Highly Simplified Maker And Cell) method Two-dimensional two-phase flow analysis technique is developed to evaluate a validity of these models. And verification analyses are carried out shown in the following. (1) Two-dimensional square cavity flow (2) Two-dimensional natural convection in a square cavity (3) Air blow down from a pressure vessel (4) Dam break-down problem (5) Edwards pipe blow down problem. In each verification analysis, good agreements are obtained and the validity of the models to a multi phase numerical method is confirmed.