An improved method using fuzzy logic for predicting liquid slip holdup in multiphase flow in pipes. The method improves the Beggs and Brill multiphase flow correlation. Fuzzy sets are defined for all variables in the Beggs Brill liquid-slip holdup equation horizontal multiphase flow. Fuzzy logic is used to calculate the Beggs Brill a, b, and c coefficients from known values for Froude number and the no-slip holdup. Using the Minami and Brill data set and the Abdul Majeed data set the fuzzy logic prediction of liquid slip holdup is compared to the Beggs Brill correlation, the modified Beggs Brill correlation, and several other multiphase correlations. Using a variety of error metrics the fuzzy logic predictions perform better than all other multiphase correlations.
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