Abstract
This work investigates the simulation of dilute emulsions in a Model ACIP2 Sonolator using CFD and population balance methods. Two breakage frequency models are used, which differ in the expression of the drop breakage time. Drop breakage modeling based on homogenous isotropic turbulence (HIT) shows poor agreement of the Sauter mean diameter when compared to experiment; simulations with the empirical Alopaeus et al. (AS) [1] model yield better agreement. By perturbing the classical HIT spectrum, it is shown that the breakage time in the AS model corresponds to a non-isotropic energy spectrum 퐸(휅) ~ 휅−푝 with 푝>3. Such spectra have been observed in the non-isotropic near field in a Model A Sonolator, which provides a plausible explanation of why the AS model performs better than the HIT-based model.
Original language | English |
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Journal | Chemical Engineering and Technology |
Early online date | 20 Mar 2019 |
DOIs | |
Publication status | Published - 2019 |
Keywords
- emulsion
- turbulence
- high-pressure homogenizer
- breakage frequency
- drop breakup