A heat transfer textbook

Models for predicting flow pattern transitions during steady gas-liquid flow in vertical tubes are developed, based on physical mechanisms suggested for each transition. These models incorporate the effect of fluid properties and pipe size and thus are largely free of the limitations of empirically based transition maps or correlations.

Modelling flow pattern transitions for steady upward gas-liquid flow in vertical tubes

A flow pattern map for gas—liquid flow in horizontal pipes

This paper presents an overview of the parabolic-trough collectors that have been built and marketed during the past century, as well as the prototypes currently under development. It also presents a survey of systems which could incorporate this type of concentrating solar system to supply thermal energy up to 400 °C, especially steam power cycles for electricity generation, including examples of each application.

Parabolic-trough solar collectors and their applications

A new correlation for the prediction of frictional pressure drop for two-phase flow in pipes is suggested which is simple and more convenient to use than other methods. To determine their reliabilities, this correlation and fourteen correlations from the literature were checked against a data bank containing 9300 measurements of frictional pressure drop for a variety of fluids and flow conditions. It was found that the best agreement between predicted and measured values was obtained using the correlation suggested by Bandel. Somewhat less but still reasonable accuracy of pressure drop prediction is provided by a group of identified correlations, which includes the correlation described in this paper.

A simple friction pressure drop correlation for two-phase flow in pipes

Models are presented for determining flow regime transitions in two-phase gas-liquid flow. The mechanisms for transition are based on physical concepts and are fully predictive in that no flow regime transitions are used in their development. A generalized flow regime map based on this theory is presented.

A model for predicting flow regime transitions in horizontal and near horizontal gas-liquid flow

Frictional pressure drop in two‐phase flow: A. A comparison of existing correlations for pressure loss and holdup

Frictional pressure drop in two-phase flow: B. An approach through similarity analysis

A series of equations are developed based on the physical processes thought to take place during slug flow which are used to predict the hydrodynamic character of this complex flow pattern. New experimental results are reported which appear to validate the model.

A. E. Dukler

Papers

A model for predicting flow regime transitions in horizontal and near horizontal gas-liquid flow

Modelling flow pattern transitions for steady upward gas-liquid flow in vertical tubes

Frictional pressure drop in two‐phase flow: A. A comparison of existing correlations for pressure loss and holdup

Frictional pressure drop in two-phase flow: B. An approach through similarity analysis

Hydrodynamic model for gas‐liquid slug flow in vertical tubes