التفاصيل البيبلوغرافية
| العنوان: |
A self-induced mechanism of large-scale helical structures in compressible turbulent flows |
| المؤلفون: |
Yan, Zheng, Wang, Jianchun, Wang, Lifeng, Lei, Zhu, Wu, Junfeng, Duan, Junyi, Tong, Fulin, Li, Xinliang, Yu, Changping |
| سنة النشر: |
2024 |
| المجموعة: |
Physics (Other) |
| مصطلحات موضوعية: |
Physics - Fluid Dynamics |
| الوصف: |
A novel self-sustaining mechanism is proposed for large-scale helical structures in compressible turbulent flows. The existence of two channels of subgrid-scale and viscosity terms for large-scale helicity evolution is confirmed for the first time, through selecting a physical definition of the large-scale helicity in compressible turbulence. Under the influence of the fluid element expansion, it is found that the helicity is generated at small scales via the second-channel viscosity, and the inverse cross-scale helicity transfers at inertial scales through the second-channel helicity flux. Together, they form a self-induced mechanism, which provides a physical insight into the long-period characteristic of large-scale helical structures in the evolution of compressible flow systems. |
| نوع الوثيقة: |
Working Paper |
| DOI: |
10.1103/PhysRevFluids.9.094603 |
| URL الوصول: |
http://arxiv.org/abs/2402.01996 |
| رقم الانضمام: |
edsarx.2402.01996 |
| قاعدة البيانات: |
arXiv |