Development of an open spray model for the FLUENT framework

Pischke, Philipp

Aachen : Publikationsserver der RWTH Aachen University (2014)
Conference Presentation

In: ANSYS Conference & 28 th CADFEM Users' Meeting 2010 : November 3-5, 2010, Eurogress Aachen, Germany
Page(s)/Article-Nr.: 10 S.


To overcome the limitations of the FLUENT built-in spray models, an open model structure has been developed that offers extended breakup and drag models, vaporization laws and collision models. For secondary breakup, the TAB and KH-model already integrated in FLUENT have been reimplemented. The open model structure allows applying both models simultaneously, i.e. the TAB models for low Weber number droplets and the KH model for high Weber number droplets. Aside from these standard models, additional models have been implemented, e.g. a very recent phenomenological model by Chryssakis and Assanis, and a mixed physical-phenomenological model by Reichelt. All breakup models are implemented with their corresponding drag laws. The vaporization models are based on heat and mass transfer laws by Sirigniano. The collision models are based on O’Rourke- and NTC-algorithms and account for all collision regimes (coalescence, stretching separation, reflexive separation and bouncing). Coupling between the models has been extended over the standard FLUENT models; e.g. the vaporization models account for drop deformation and the collision model directly influences secondary breakup. In this presentation, the focus is put on technical aspects of the model implementation.