论文标题
对称性和湍流建模。批判性检查
Symmetries and turbulence modeling. A critical examination
论文作者
论文摘要
Klingenberg，Oberlack＆Pluemacher（2020）的最新研究提出了一种一般建模湍流的新策略。在其中提供了概念验证，以实现空间不断发展的湍流平面喷气流的特定流程配置，得出的结论是，他们的模型可以生成超越经典的缩放定律。但是，我们的评论表明，他们的概念证明是有缺陷的，他们新提出的缩放法律并没有超越任何古典解决方案。因此，他们建立了一个新的，更先进的湍流模型的论点无法确认。该问题已经植根于建模策略本身，因为非物理统计缩放对称性得到了实现。打破这种对称性将恢复内部一致性，并将所有类似的解决方案转移回经典的解决方案。要注意的是，它们的模型还包括第二个非物理对称性。其中一位作者已经承认了这一事实是在以前出版的Corrigendum中（Sadeghi，Oberlack＆Gauding，2020年）中的动荡流量流动。但是，没有引用折叠，因此读者并未意识到他们的方法具有根本的问题，导致不一致和结果矛盾。取而代之的是，同样的非物理对称性再次发表。但是，这种不科学的行为没有得到纠正，而是在随后的误导性出版物Klingenberg＆Oberlack（2022）中重复并继续进行，该出版物在附录中的此更新中进行了检查。
The recent study by Klingenberg, Oberlack & Pluemacher (2020) proposes a new strategy for modeling turbulence in general. A proof-of-concept is presented therein for the particular flow configuration of a spatially evolving turbulent planar jet flow, coming to the conclusion that their model can generate scaling laws which go beyond the classical ones. Our comment, however, shows that their proof-of-concept is flawed and that their newly proposed scaling laws do not go beyond any classical solutions. Hence, their argument of having established a new and more advanced turbulence model cannot be confirmed. The problem is already rooted in the modeling strategy itself, in that a nonphysical statistical scaling symmetry gets implemented. Breaking this symmetry will restore the internal consistency and will turn all self-similar solutions back to the classical ones. To note is that their model also includes a second nonphysical symmetry. One of the authors already acknowledged this fact for turbulent jet flow in a formerly published Corrigendum (Sadeghi, Oberlack & Gauding, 2020). However, the Corrigendum is not cited and so the reader is not made aware that their method has fundamental problems that lead to inconsistencies and conflicting results. Instead, the very same nonphysical symmetry gets published again. Yet, this unscientific behaviour is not corrected, but repeated and continued in the subsequent and further misleading publication Klingenberg & Oberlack (2022), which is examined in this update in the appendix.
