Optimization of various coal-conversion systems. Quarterly report No. 4 for the period February 1, 1982-April 30, 1982. [Dependence on flow regime]

It is well known that the identification of flow regimes is important in scale-ups and designs of multiphase reactors. Therefore, it is natural that the selections of parameter prediction methods for the reactor models should be based on flow regimes. Very few correlations, theories and models are capable of covering the whole spectrum of flow regimes. Often, accuracy is sacrificed for generality. By concentrating on each individual flow regime and its characteristics, the correlations and models selected can be expected to give better results. The evaluation of correlations for phase holdups and liquid dispersion coefficients has been evaluated for both the slurry reactors and the three-phase fluidized bed reactors.