This paper describes a two-phase jet model for predicting the HF rainout (capture) in HF/additive releases. The parent droplets of the release mixture constitute the first phase. The second phase is a vapor-liquid fog. The drops are not in equilibrium with the fog phase with which they exchange mass and energy. The fog at any location is assumed to be in local equilibrium. The fog-phase calculations account for HF oligomerization and HF-water complex equilibria in the vapor phase and vapor-liquid equilibrium in the fog. The model incorporates jet trajectory calculations and hence can predict liquid 'rainout' and the capture distance. The model HF capture predictions are in agreement with small and large scale HF/additive release experiments. The fog properties and flow rate may be used to initialize atmospheric fog dispersion models for use in risk assessment calculations.
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Environmental Chemistry
- Waste Management and Disposal
- Health, Toxicology and Mutagenesis