A two-fluid model for reflooding of a vertical tube: structure and stability of the inverted annular flow model

Journal Article · Sat Jan 01 04:00:00 EST 1983 · AIChE Symp. Ser.; (United States)

OSTI ID:5313746

Kawaji, M; Banerjee, S

A two-fluid model for interpretation of experimental results in reflooding of a vertical tube is discussed. The model for the inverted annular flow regime contains consideration of interphase momentum interactions due to vapor thrust and surface tension, in addition to friction. A linear stability analysis indicates that the governing equations are stable to short wavelength disturbances, but the model does capture long wavelength disturbance growth and propagation that are qualitatively in agreement with observations. The growth of long wavelength instabilities leads to the transition to a dispersed flow regime. Calculations have been completed for a limited number of experimental results with a set of constitutive relations based on the author's present understanding of the mechanisms involved. Good comparisons with fast reflood data were obtained, though areas in the constitutive relationships requiring improvement were indicated.

• Research Organization: Department of Nuclear Engineering, University of California, Berkeley, CA
• OSTI ID: 5313746
• Journal Information: AIChE Symp. Ser.; (United States), Journal Name: AIChE Symp. Ser.; (United States) Vol. 79:225; ISSN ACSSC
• 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
DESIGN
FLOW MODELS
FRICTION
MATHEMATICAL MODELS
MOMENTUM TRANSFER
STABILITY
SURFACE PROPERTIES
SURFACE TENSION
TUBES