Lockhart-Martinelli correlation heat transfer

Chisolm, D., 1967, A Theoretical Bases for the Lockhart/Martinelli Correlation for Two-Phase Flow, Int. J. Heat Mass Transfer 10 1767-1778. (3)... 

D. Chisholm, A theoretical basis for the Lockhart-Martinelli correlation for two-phase flow, Int.J. Heat Mass Transfer, 1967, 10, 1767-1778. 

Dengler and Addoms 8 measured heat transfer to water boiling in a 6 m tube and found that the heat flux increased steadily up the tube as the percentage of vapour increased, as shown in Figure 14.4. Where convection was predominant, the data were correlated using the ratio of the observed two-phase heat transfer coefficient (htp) to that which would be obtained had the same total mass flow been all liquid (hi) as the ordinate. As discussed in Volume 6, Chapter 12, this ratio was plotted against the reciprocal of Xtt, the parameter for two-phase turbulent flow developed by Lockhart and Martinelli(9). The liquid coefficient hL is given by ... 

The results of the second part of this investigation are shown in Fig. 5, which is a comparison of our experimental pressure drop data with the work done by Martinelli and Nelson [2] based upon the correlation of Lockhart and Martinelli [3]. The results of our experiments have shown that the Lockhart and Martinelli correlation may be applicable to liquid hydrogen with high rates of heat transfer. However, more refined experiments should be conducted. 

Unfortunately, pressure drop data for two-phase flow are just as scarce as data for the heat transfer coefficients. Consequently, the pressure drop is generally assumed to be equal to that produced for an all-gas flow. Modifications to this approach usually involve correlations by Chenoweth and Martin or Lockhart and Martinelli, which were developed for two-phase flow in tubes at normal temperatures. ... 

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