COMMIX-1B: a three-dimensional transient single-phase computer program for thermal hydraulic analysis of single and multicomponent systems. Volume I. Equations and numerics

Technical Report · Sun Sep 01 04:00:00 EDT 1985

OSTI ID:5833478

The COMMIX-1B computer program is an extended version of COMMIX-1A with three major additions: (1) three more turbulence-model options for the computation of turbulent diffusivities, (2) a volume-weighted skew-upwind difference scheme to reduce numerical diffusion, and (3) a single formulation to combine semi-implicit and fully-implicit solution procedures. COMMIX-1B solves the conservation equations of mass, momentum, and energy, and transport equations of turbulence parameters. It is designed to perform steady-state/transient, single-phase, three-dimensional analysis of fluid flow with heat transfer in a single-component or a multicomponent system. The program is developed for the analysis of heat transfer and fluid flow processes in a nuclear reactor system. However, it is designed in a generalized fashion such that with no or minimal modification, it can be used to analyze processes in any engineering equipment, or in any system. This report describes in detail the basic equations, formulations, solution procedures, rebalancing scheme, and models to describe the auxiliary phenomena. 89 refs., 48 figs., 27 tabs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5833478
• Report Number(s): NUREG/CR-4348-Vol.1; ANL-85-42-Vol.1; ON: TI86005237
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
COMPUTERIZED SIMULATION
DIFFERENTIAL EQUATIONS
ENERGY TRANSFER
EQUATIONS
FINITE DIFFERENCE METHOD
FLUID FLOW
FLUID MECHANICS
FUEL ASSEMBLIES
HEAT TRANSFER
HYDRAULICS
ITERATIVE METHODS
MATHEMATICS
MECHANICS
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
NUMERICAL SOLUTION
POWER PLANTS
SIMULATION
SOURCE TERMS
THERMAL POWER PLANTS
THREE-DIMENSIONAL CALCULATIONS
TURBULENT FLOW