抄録
Conventional modeling of two-phase flow, including homogeneous, drift-flux and two-fluid models, is based on timeaveraged properties, even in the case of simulation of transient behavior. Then the inherent fluctuations of two-phase flow are neglected so as to ensure smoothed and continuous properties of parameters, such as void fraction and velocity. Gasliquid two-phase flow is a typical complex system, and thus to simulate inherent fluctuation, e.g. of slug and churn flow, is rather hard with above-mentioned conventional modeling. This paper describes one of the approaches to such simulation aiming at pattern formation and/or evolution of void fraction fluctuation of two-phase flow. The present simulation is conducted based on the void propagation equation and additional limited number of momentum effects, so that the complex properties are successfully realized on a computer.
