activity coefficients in nonideal liquid mixtures外文翻译.pdfVIP

VS V, = superficial slip velocity, cm/s v, = - 1 - x Greek Letters is more nearly constant than V,. Examination of the present Ap = difference in densities of dispersed and continuous holdup data, data of Gayler, Roberts, and Pratt (1953), phases, g/cm3 and data from an earlier study of Gayler and Pratt (1951) E = void fraction of the packing, dimensionless reveals that neither V, nor V, is a satisfactory parameter p = viscosity, poise for correlating holdup over a wide range of fluid proper- AVc,01/2= defined by Equation (5) ties and flow rates. Both our data and that of Gayler and AV,,01/2 = defined by Equation ( 5 ) Pratt (1951) contained primarily high values of holdup ( Subscripts l o % ) , and in such cases V, appears to be the preferred c, d = continuous and dispersed phases, respectively correlating parameter. This is illustrated in Figure 2 of o = intercept value; flow rate of other phase ap- Watson and McNeese (1973). The data of Gayler, Roberts, proaching zero and Pratt (1933) contained lower values of holdup (most values were 10% ) ,and V, was shown to be more nearly LITERATURE CITED constant. At low values of holdup, there is little difference between V, and V,. Generally, V, is believed to be a more Ballard, J. H., and E. L