Numerical calculation of flashing from long pipes using a two-field model
A two-field model for two-phase flows, in which the vapor and liquid phases have different densities, velocities, and temperatures, has been used to calculate the flashing of water from long pipes. The IMF (Implicit Multifield) technique is used to numerically solve the transient equations that govern the dynamics of each phase. The flow physics is described with finite rate phase transitions, interfacial friction, heat transfer, pipe wall friction, and appropriate state equations. The results of the calculations are compared with measured histories of pressure, temperature, and void fraction. A parameter study indicates the relative sensitivity of the results to the various physical models that are used. (auth)
- Research Organization:
- Los Alamos Scientific Lab., N.Mex. (USA)
- DOE Contract Number:
- W-7405-ENG-36
- NSA Number:
- NSA-33-016424
- OSTI ID:
- 4077425
- Report Number(s):
- LA--6104-MS
- Country of Publication:
- United States
- Language:
- English
Similar Records
Numerical calculation of flashing from long pipes using a two-field model
Numerical calculation of flashing from long pipes using a two-field model
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Sat May 01 00:00:00 EDT 1976
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OSTI ID:7267717
Numerical calculation of flashing from long pipes using a two-field model
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· J. Comput. Phys.; (United States)
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Related Subjects
*BLOWDOWN-- TWO-PHASE FLOW
*BWR TYPE REACTORS-- BLOWDOWN
*PWR TYPE REACTORS-- BLOWDOWN
*TWO-PHASE FLOW-- NUMERICAL SOLUTION
220900* --Nuclear Reactor Technology--Reactor Safety
COMPARATIVE EVALUATIONS
COMPUTER CALCULATIONS
DATA
EQUATIONS OF STATE
FLASHING
FLUID FLOW
LOSS OF COOLANT
N42300 --Engineering--Heat Transfer & Fluid Flow
N77100 --Reactors--Power Reactors
Non-breeding
Light-water Moderated
Boiling Water-cooled
N77200 --Reactors--Power Reactors
Non-breeding
Light-water Moderated
Non-boiling Water-cooled
N77900* --Reactors--Reactor Safety & Environmental Aspects
PRESSURE GRADIENTS
STEAM
TRANSIENTS
WATER
*BWR TYPE REACTORS-- BLOWDOWN
*PWR TYPE REACTORS-- BLOWDOWN
*TWO-PHASE FLOW-- NUMERICAL SOLUTION
220900* --Nuclear Reactor Technology--Reactor Safety
COMPARATIVE EVALUATIONS
COMPUTER CALCULATIONS
DATA
EQUATIONS OF STATE
FLASHING
FLUID FLOW
LOSS OF COOLANT
N42300 --Engineering--Heat Transfer & Fluid Flow
N77100 --Reactors--Power Reactors
Non-breeding
Light-water Moderated
Boiling Water-cooled
N77200 --Reactors--Power Reactors
Non-breeding
Light-water Moderated
Non-boiling Water-cooled
N77900* --Reactors--Reactor Safety & Environmental Aspects
PRESSURE GRADIENTS
STEAM
TRANSIENTS
WATER