Improved Methods for Mixing-Limited Spray Modeling

TL;DR

This paper introduces ELMO, a new mixing-oriented spray model that emphasizes gas entrainment over interfacial features, validated through canonical spray simulations in a 3D CFD framework.

Contribution

The paper presents ELMO, a novel Eulerian-Lagrangian spray model focusing on mixing processes, validated against standard spray datasets.

Findings

ELMO accurately predicts spray behavior in canonical tests.

Gas entrainment is confirmed as the dominant factor in spray evolution.

Model validation shows good agreement with experimental data.

Abstract

The realization that interfacial features play little role in diesel spray vaporization and advection has changed the modus operandi for spray modeling. Lagrangian particle tracking has typically been focused on droplet behavior, with sub-models for breakup, collision, and interfacially limited vaporization. In contrast, the mixing-oriented spray models are constructed so that gas entrainment is the limiting factor in the evolution of momentum and energy. In this work, a new spray model, ELMO (Eulerian-Lagrangian Mixing-Oriented), is implemented in a three-dimensional CFD code with two-way coupling with the gas phase. The model is verified and validated with three canonical sprays including spray A, H, and G from the ECN database.