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Multiphase Science and Technology

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ISSN Druckformat: 0276-1459

ISSN Online: 1943-6181

SJR: 0.144 SNIP: 0.256 CiteScore™:: 1.1 H-Index: 24

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TWO-FLUID-1D-AVERAGED MODEL EQUATIONS FOR A PIPE UNDERGOING ARBITRARY MOTIONS

Volumen 24, Ausgabe 1, 2012, pp. 1-45
DOI: 10.1615/MultScienTechn.v24.i1.10
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ABSTRAKT

The WAHA code aims at describing two-phase water hammers in piping systems with emphasis on the calculation of the mechanical loads induced on the pipes. A new two-fluid model is derived which is appropriate for studying the interaction of a deformable pipe with the flow it contains. The equations are provided in two different sets of variables: Eulerian and Lagrangian with respect to the pipe. The new equations are compared to those of the plain two-fluid model for a rectilinear pipe and obviously they do not seem to be of a different nature, though many new terms appear, the significance of which is shortly outlined. The theoretical derivation of these equations is aimed primarily at calculating reaction forces applied on a piping system from the results of one-dimensional thermal-hydraulic code for future inclusion in full form in the WAHA code.

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