Transient analysis method for two-dimensional discharge flow using a two-fluid model

Conference · Fri Jan 01 04:00:00 EST 1988 · Transactions of the American Nuclear Society; (USA)

OSTI ID:5655767

Minato, Akihiko; Murata, Shigeto

Recent advancements in reactor safety analysis require more detailed predictions of two-phase flow behavior. Therefore, a transient calculation method has been developed for two-dimensional two-phase flow using the two-fluid model. This method treats non-equilibrium two-phase flows by solving the partial differential equations of mass, momentum, and energy balances for each phase. With the finite difference method, which is widely used for two-phase flow analysis, difficulties are incurred when the finite difference of gas velocity is calculated between a node with two-phase mixture and one with single-phase water and no gas velocity. The present method employs the control volume formulation in order to avoid this difficulty and it is designed to simulate local two-dimensional two-phase flow dynamics. The objective of this paper is to outline the fundamentals of the numerical calculation method and its capability of calculating two-dimensional discharge flow from a pipe. This calculation technique is able to treat effects of flow contraction at the pipe inlet and flow expansion at the exit upon discharge.

• OSTI ID: 5655767
• Report Number(s): CONF-881011--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (USA) Journal Volume: 57
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220100* -- Nuclear Reactor Technology-- Theory & Calculation
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
DIFFERENTIAL EQUATIONS
ENERGY BALANCE
ENERGY TRANSFER
EQUATIONS
FINITE DIFFERENCE METHOD
FLUID FLOW
FLUID MECHANICS
HEAT TRANSFER
HYDRAULICS
ITERATIVE METHODS
KINETICS
MASS TRANSFER
MECHANICS
MOMENTUM TRANSFER
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
REACTOR KINETICS
REACTOR SAFETY
SAFETY
TIME DEPENDENCE
TWO-DIMENSIONAL CALCULATIONS
TWO-PHASE FLOW