Towards LES of Liquid Jet Atomization Using an Eulerian-Lagrangian Multiscale Approach

IF 2 3区工程技术 Q3 MECHANICS

Flow, Turbulence and Combustion Pub Date : 2024-12-23 DOI:10.1007/s10494-024-00620-9

Elias Trautner, Josef Hasslberger, Markus Klein

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引用次数: 0

Abstract

This study is concerned with Large Eddy Simulation of liquid jet atomization using a two-way coupled Eulerian-Lagrangian multiscale approach. The proposed framework combines Volume-of-Fluid interface capturing with Lagrangian Particle Tracking. The former is used to compute the core jet and large liquid elements in the near-nozzle region, whereas the latter is used to track the large number of small droplets in the dilute downstream region of the spray. The convective and surface tension sub-grid scale terms arising in the context of two-phase flow LES are closed using suitable models, and secondary atomization is considered by employing a modified version of the Taylor Analogy Breakup model. The introduced framework is used to simulate an oil-in-air atomization as well as the Diesel-like Spray A test case of the Engine Combustion Network. Compared to previous studies based on Eulerian-Lagrangian methods, the present work stands out for the high-fidelity numerical approach, the complex test cases and the detailed comparison of the results to experimental data, which indicates a promising performance.

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用欧拉-拉格朗日多尺度方法研究液体喷射雾化的LES

本文采用双向耦合欧拉-拉格朗日多尺度方法对液体射流雾化过程进行了大涡模拟。该框架将流体体积界面捕获与拉格朗日粒子跟踪相结合。前者用于计算近喷嘴区域的核心射流和大液元，后者用于跟踪喷雾下游稀释区域的大量小液滴。采用合适的模型对两相流LES中产生的对流和表面张力亚网格尺度项进行了封闭，并采用改进的Taylor类比破裂模型考虑了二次雾化。将所引入的框架应用于模拟发动机燃烧网络的空气中油雾化和类柴油喷雾A试验用例。与以往基于欧拉-拉格朗日方法的研究相比，本研究具有数值方法保真度高、测试用例复杂、结果与实验数据对比细致等特点，具有良好的应用前景。

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来源期刊

Flow, Turbulence and Combustion 工程技术-力学

CiteScore

5.70

自引率

8.30%

发文量

审稿时长

2 months

期刊介绍： Flow, Turbulence and Combustion provides a global forum for the publication of original and innovative research results that contribute to the solution of fundamental and applied problems encountered in single-phase, multi-phase and reacting flows, in both idealized and real systems. The scope of coverage encompasses topics in fluid dynamics, scalar transport, multi-physics interactions and flow control. From time to time the journal publishes Special or Theme Issues featuring invited articles. Contributions may report research that falls within the broad spectrum of analytical, computational and experimental methods. This includes research conducted in academia, industry and a variety of environmental and geophysical sectors. Turbulence, transition and associated phenomena are expected to play a significant role in the majority of studies reported, although non-turbulent flows, typical of those in micro-devices, would be regarded as falling within the scope covered. The emphasis is on originality, timeliness, quality and thematic fit, as exemplified by the title of the journal and the qualifications described above. Relevance to real-world problems and industrial applications are regarded as strengths.