Development of Liquid Jet Atomization and Breakup Models Including Turbulence Effects

Modeling of multi-component droplet coalescence in evaporating and non-evaporating diesel fuel sprays

“…In this study, a recently developed hybrid primary/secondary droplet breakup model of (Trinh and Chen, 2006) is used and implemented for atomization and spray of liquid fuels from injectors in KIVA-3V (rel.2) (Amsden, 1993). For primary droplet breakup the T-Blob model (Trinh and Chen, 2006) that accounts for nozzle geometry of and liquid turbulence is implemented in this research. In this model, liquid is injected as discrete parcels of drops or blob.…”

“…These two scales along with τ and C a are formulated from the original WAVE model (Reitz, 1987). The turbulence characteristic length and time scales L t and τ t associated with atomizing droplets were derived based on an analytical solution of the k−ε turbulence model and formulated from (Trinh and Chen, 2006). The product drop radius r p is calculated as:…”

“…The value of r t , and the weighting coefficient c t can be found in (Trinh and Chen, 2006). For the secondary breakup process, the T-TAB model (Trinh and Chen, 2006) is implemented. Here:…”

“…Except for the second term on the right-hand side, Equation (23) is the same as the governing equation of the TAB model (O'Rourke and Amsden, 1987). The original reference (Trinh and Chen, 2006) may be consulted for detailed derivation and values of various coefficients in Equation (23). Based on the hybrid T-Blob/T-TAB modeling methodology, when product diameter reaches blob diameter (or certain percent of blob diameter) breakup will switch to the T-TAB model.…”