Abstract
A statistical approach to two-phase inertia forces leads to a mixing length theory in which different flow structures correspond to different flow regimes. The theory is used in conjunction with void and velocity profile data to examine developing and developed flow profiles for bubble and dispersed annular flows. One- and two-component flows are considered for various channel geometries. Asymmetric profiles such as those that result from asymmetric heating or horizontal flows are also described by the theory. In the case of annular flows liquid film thickness measurements are consistent with the theory. Shear stress data suggest a Prandtl mixing length constant slightly less than that for single phase flow theory. The core profiles at the boiling crisis condition are consistent with a local reduction of the liquid film to zero thickness.
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