Numerical grid and time-step-dependencies of Discrete Droplet Lagrangian spray models are identified. The two main sources of grid-dependency are due to errors in predicting the droplet-gas relative velocity, and errors in describing droplet-droplet collision and coalescence processes. For reducing grid-dependency due to the relative velocity effects, gas jet theory is proposed and applied to model diesel sprays. For the time-step dependency, it is identified that the collision sub-model results in drop size variation in the standard spray model. A proposed spray model based on the gas-jet theory is found to improve the time-step independency also along with the mesh independency. The use of both Eulerian (collision mesh) and Lagrangian (radius of influence) collision models along with gas-jet theory is found to provide mesh-independent results.
- Internal Combustion Engine Division
Reduction of Numerical Parameter Dependencies in Diesel Spray Models
- Views Icon Views
- Share Icon Share
- Search Site
Abani, N, Munnannur, A, & Reitz, RD. "Reduction of Numerical Parameter Dependencies in Diesel Spray Models." Proceedings of the ASME 2007 Internal Combustion Engine Division Fall Technical Conference. ASME 2007 Internal Combustion Engine Division Fall Technical Conference. Charleston, South Carolina, USA. October 14–17, 2007. pp. 163-174. ASME. https://doi.org/10.1115/ICEF2007-1667
Download citation file: