PORTHOS - A computer code for solving general three-dimensional, time-dependent two-fluid equations

Conference · Thu Jan 01 04:00:00 EST 1987

OSTI ID:5746301

Chan, R K.C.; Masiello, P J; Srikantiah, G S

PORTHOS is a computer code for calculating three-dimensional steady-state or time dependent two-phase flow in porous or non-porous media. It was developed with the initial goal of simulating two-phase flows in steam generators of PWR nuclear power plants. However, the modular code design and the generality of approach allow application to a wide variety of problems in single phase or two-phase flow. The present method employs a finite difference technique to solve the complete set of two-fluid equations, i.e., the ''six-equation'' model which includes tow mass conservation equations, two momentum equations, two energy equations, as well as constitutive equations to effect closure of the system. The use of volume porosity and surface permeability allows the treatment of complex geometry. This paper describes the mathematical basis, the numerical solution procedure employed, and the results of comparisons with two sources of experimental data: the 8MW FRIGG loop experiment and the Electricite de France (EdF) Bugey 4 steam generator test. Calculations of the FRIGG experiment by PORTHOS, in terms of void fraction distribution, are in good agreement with measurements. Verification against the EdF data is also quite satisfactory.

• OSTI ID: 5746301
• Report Number(s): CONF-861211-
• Country of Publication: United States
• Language: English

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