The Favre averaged, steady state equations for isothermal two-phase gas-liquid flows have been simplified to a set of ordinary differential equations for the case of two-dimensional, fully developed flow in ducts. An eddy viscosity model is suggested for closure. This new model takes into account the effects of bubble agitation as well as that of the wall generated turbulence. The momentum interaction terms which involve complex, non-linear constitutive relations have also been simplified with appropriate assumptions retaining the most significant contributions from the fluctuating void fraction and velocity components. The resulting equations are solved under various conditions in order to determine separately the effects of bubble agitation and wall generated turbulence on the flow. The results show that the new model has the ability to model local contributions to turbulent mixing from various mechanisms as well as the significant effect of void fraction profiles on the continuous phase.
|Original language||English (US)|
|Number of pages||4|
|Journal||American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED|
|State||Published - Dec 1 1996|
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