A comprehensive numerical investigation of the spray characteristics in spill-return atomizers using coupled VOF and Euler-Lagrange approach

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2024-10-26 DOI:10.1016/j.partic.2024.10.010

Wassim Harizi, Fathi Hamdi, Mouldi Chrigui

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Abstract

This research paper investigates a three-dimensional, two-phase flow dynamics, and atomization characteristics of a spill return atomizer. The method includes the internal flow field, primary and secondary atomization which are modeled using the hybrid approach Volume of Fluid to Discrete Phase Model (VOF to DPM). A comparison between the Large Eddy Simulation (LES) and The k-omega Shear Stress Transport turbulence model (SST k-ω) in combination with the Volume of Fluid (VOF) model, along with the Adaptive Mesh Refinement (AMR) method, to predict the breakup of the liquid core is carried out. The investigation presents axial and tangential distributions of velocity, mean diameter, and spray cone angle of droplets at spray pressures of Spill-to-Feed Ratio (SFR) equal to 0.9. The numerical results are validated against the Phase-Doppler Anemometry (PDA) experiment. A relative error, of less than 7.3%, is recorded. The study systematically explores the spatiotemporal evolution of the flow field, including the liquid surface wave motion, liquid film characteristics, and the formation/atomization of the fluid spray cone downstream of the injector.

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使用 VOF 和 Euler-Lagrange 耦合方法对溢出回流式雾化器中的喷雾特性进行综合数值研究

本研究论文探讨了溢出回流雾化器的三维两相流动力学和雾化特性。该方法包括内部流场、一次雾化和二次雾化，使用流体体积到离散相模型（VOF 到 DPM）混合方法进行建模。比较了大涡流模拟（LES）和 k-ω 剪切应力传输湍流模型（SST k-ω）与流体体积模型（VOF）以及自适应网格细化（AMR）方法的结合，以预测液芯的破裂。研究显示了在溢出与进料比（SFR）等于 0.9 的喷雾压力下，液滴的速度、平均直径和喷雾锥角的轴向和切向分布。数值结果与相位多普勒风速仪（PDA）实验进行了验证。记录的相对误差小于 7.3%。该研究系统地探讨了流场的时空演变，包括液体表面波运动、液膜特征以及喷射器下游流体喷雾锥的形成/雾化。

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.