Spray impingement modelling: Evaluation of the dissipative energy loss and influence of an enhanced near-wall treatment
Spray impingement modelling: Evaluation of the dissipative energy loss and influence of an enhanced near-wall treatment
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DOI：
10.1016/j.fuproc.2012.08.002
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发表时间：
2013-03
影响因子：
7.5
通讯作者：
C. Rodrigues;Jorge M M Barata-Jorge-M-M-Barata-70671413;André R. R. Silva-André-R.-R.-Silva-48404723
中科院分区：
文献类型：
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作者：
C. Rodrigues;Jorge M M Barata-Jorge-M-M-Barata-70671413;André R. R. Silva-André-R.-R.-Silva-48404723
本研究的目标是通过数值研究，旨在研究使用耗散能量项的影响，当它们被嵌入到一个特定的分散模型中时，有助于提高知识的喷雾冲击主题。比较所有的数值方法，一个不可忽视的分歧之间的关系，在原始模型和其他从文献中得出的观察。这一事实证明了能量耗散项对二次雾化结果的影响。目前的工作还提供了一个全面的研究在飞溅事件的能量耗散的估计。这是对永久文献的重大贡献，因为发现的少数作品仅涉及传播机制。此外，本文还深入分析了近壁区边界层的强化处理对这类流动模拟的影响。这项工作表明，这种近壁液滴跟踪方法提供了一种替代方法来提高分散相的准确性，并实现更一致的结果，而无需直接网格细化。
The goal of the present research is to contribute to improve the knowledge about the spray impingement topic through a numerical study that is aimed at investigating the impact of using the dissipative energy terms that are available in the literature when they are embedded into a specific dispersion model. Comparing all the numerical approaches, a non-negligible disagreement is observed between the relationship proposed in the original model and the other ones drawn from the literature. This fact evidences the influence of the energy dissipated term on the secondary atomization outcome. The present work also provides a comprehensive study on the estimation of the energy dissipated during the splash event. This is a major contribution to the permanent literature since the few works found only addressed the spread regime. In addition, this paper gives an in-depth analysis on the influence that an enhanced treatment of the boundary layer in the region close to the wall may have in the simulation of such flows. The work revealed that this near-wall droplets tracking method provides an alternative way to increase the accuracy of the dispersed phase and achieve more consistent results without the necessity of a direct mesh refinement.