Modification of the CAB Model for Air-Assist Atomization of Food Sprays

DUBEY, Bipro, TANNER, Franz, FEIGL, Kathleen, KAARIO, Ossi and WINDHAB, Erich (2014). Modification of the CAB Model for Air-Assist Atomization of Food Sprays. In: 26th ILASS – Americas, Portland OR, USA, 18-21 May 2014.

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Abstract

The Cascade Atomization and Drop Breakup (CAB) model has been originally developed for pressure atomizers. In this study, the CAB model is modified to accommodate the atomization of low-pressure, air-assist atomizers. The modifications include the first breakup which is modeled by estimating theWeber number due to the increased liquid-gas relative velocity caused by the air flow. This breakup depends on whether the Weber number is in the catastrophic, stripping or bag breakup regime. The second modification includes a change in the product drop distributions, namely, instead of a uniform distribution, as used in the original CAB model, a X-squared distribution with the same average drop size is assumed. The model changes are validated with experimental data obtained by means of two different air-assist atomizers using an oil-in-water emulsion. The simulations are performed with a modified version of the KIVA-3 CFD code; they show good agreement with the experiments.

Item Type: Conference or Workshop Item (Paper)
SWORD Depositor: Symplectic Elements
Depositing User: Symplectic Elements
Date Deposited: 30 Apr 2020 12:04
Last Modified: 30 Apr 2020 12:15
URI: http://shura.shu.ac.uk/id/eprint/24567

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