Application of a multifield model to reflooding of a hot vertical tube: Part 1 - Model structure and interfacial phenomena

Journal Article · Sun Feb 01 04:00:00 EST 1987 · Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.3248044· OSTI ID:5486767

Kawaji, M ^[1]; Banerjee, S ^[2]

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1. Japan Atomic Energy Research Inst., Tokai Mura (Japan)
2. Univ. of California, Santa Barbara (USA)

This is the first of a series of two papers reporting on a study of reflooding of a hot vertical tube. A mechanistic model of reflood is developed using a multifield modeling approach to analyze experimental data reported previously (1). In Part 1 of this paper, the mathematical model for the thermodraulic processes during reflood is derived from the general two-field conservation equations,a nd its structure is examined. Linear stability of the equation system is analyzed incorporating consideration of phase pressure differences. For inverted annular flow, the system is stable to short-wavelength perturbations and captures long-wavelength interfacial instabilities. The length of the most unstable waves is also derived in the analysis and agrees well with the available data. For dispersed flow, the system is predicted to become unstable if the Weber number exceeds a critical value of 8. In Part 2 (2), constitutive relations for reflood are formulated and model is numerically solved for comparison with experimental data.

• OSTI ID: 5486767
• Journal Information: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transcations of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 109:1; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

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