Calculation of phase inversion in concentrated emulsions

Calculation of Phase Inversion in Concentrated Emulsions CAPICO... 

The effect of the HLB of surfactant blends (calculated as the weight average) on the stability of the concentrated emulsions is presented in Fig. 11. (No w/o concentrated emulsion could be prepared using the surfactant blends employed in Fig. 11 because of the phase inversion that occurred at the beginning of the... 

The factor in Eq. (36) accounts for the effect of finite surface viscosity (j/s) and has been computed by Desai and Kumar [61] as a function of the inverse of the dimensionless surface viscosity (y = 0.4387/i /5jiIt must be emphasized that their results for the calculation of Cy are valid only for foams because they neglected the viscosity of the dispersed phase. Equation (36) can be used for liquid liquid concentrated emulsions only when the surfaces are immobile (i.e., when Cy = 1). The pressure gradient (dp/dz) can be computed as follows. 

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