The Prediction of Pressure Drop and CCFL Breakdown in Countercurrent Two-Phase Flow

[+] Author and Article Information
A. G. Ostrogorsky

Rensselaer Polytechnic Institute, Troy, N.Y. 12181

R. R. Gay

NUS Corporation, Menlo Park, Calif. 94025

R. T. Lahey

Rensselaer Polytechnic Institute, Troy, NY, 12181

J. Heat Transfer 105(4), 700-705 (Nov 01, 1983) (6 pages) doi:10.1115/1.3245651 History: Received April 19, 1982; Online October 20, 2009


A steady-state analytical model has been developed to predict channel pressure drop as a function of inlet vapor flow rate and applied heat flux during conditions of countercurrent two-phase flow. The interfacial constitutive relations utilized are flow structure dependent and allow for the existence of either smooth or wavy liquid films. A computer code was developed to solve the analytical model. Predictions of Δp versus vapor flow rate were found to agree favorably with experimental data from adiabatic, air/water systems. In addition, the model was used to predict countercurrent flow conditions in heated channels characteristic of a BWR/4 nuclear reactor fuel assembly.

Copyright © 1983 by ASME
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