A Eulerian Multi-Fluid Model for High-Speed Evaporating Sprays

Abstract

Advancements in internal combustion technology, such as efficiency improvements and the usage of new complex fuels, are often coupled with developments of suitable numerical tools for predicting the complex dynamic behavior of sprays. Therefore, this work presents a Eulerian multi-fluid model specialized for the dynamic behavior of dense evaporating liquid fuel sprays. The introduced model was implemented within the open-source OpenFOAM library, which is constantly gaining popularity in both industrial and academic settings. Therefore, it represents an ideal framework for such development. The presented model employs the classes method and advanced interfacial momentum transfer models. The droplet breakup is considered using the enhanced WAVE breakup model, where the mass taken from the parent droplets is distributed among child classes using a triangular distribution. Furthermore, the complex thermal behavior within the moving droplets is considered using a parabolic temperature profile and an effective thermal conductivity approach. This work includes an uncertainty estimation analysis (for both spatial and temporal resolutions) for the developed solver. Furthermore, the solver was validated against two ECN Spray A conditions (evaporating and non-evaporating). Overall, the presented results show the capability of the implemented model to successfully predict the complex dynamic behavior of dense liquid sprays for the selected operating conditions.

Numerical modelling of raw materials atomization and vaporization in a heat carrier gas flow in technical carbon production based on the Euler approach

“…The technique describes the primary drops formation and their transition to the Eulerian dispersed phase, where they undergo secondary fragmentation and evaporation. In [4], the authors present an Eulerian multicomponent model of liquid atomization and evaporation based on the WAVE model of jet decay. Special attention is paid to the thermal processes occurring inside moving droplets modeling.…”

Three-dimensional Numerical Model of Kerosene Evaporation in Gas Turbine Combustors

“…The technique describes the formation of primary droplets, and their transition to the Eulerian dispersed phase, where they undergo the secondary break-up and evaporation. In [11], Eulerian multicomponent model of liquid atomization and evaporation based on the WAVE decay model is presented. Special attention is paid to the modeling of thermal processes occurring inside moving droplets.…”