Altmeyer Sebastian A
Castelldefels School of Telecom and Aerospace Engineering Universitat Politècnica de Catalunya, Barcelona 08034, Spain.
Philos Trans A Math Phys Eng Sci. 2023 Mar 20;381(2243):20220121. doi: 10.1098/rsta.2022.0121. Epub 2023 Jan 30.
Many natural and industrial flows are subject to time-dependent boundary conditions and temporal modulations (e.g. driving frequency), which significantly modify the dynamics compared with their static counterparts. The present problem addresses ferrofluidic wavy vortex flow in Taylor-Couette geometry, with the outer cylinder at rest in a spatially homogeneous magnetic field subject to an alternating modulation. Using a modified Niklas approximation, the effect of frequency modulation on nonlinear flow dynamics and appearing resonance phenomena are investigated in the context of either period doubling or inverse period doubling. This article is part of the theme issue 'Taylor-Couette and related flows on the centennial of Taylor's seminal paper (part 1)'.
许多自然流动和工业流动都受到随时间变化的边界条件和时间调制（例如驱动频率）的影响，与静态流动相比，这会显著改变其动力学特性。本文研究的问题是泰勒 - 库埃特几何结构中的铁磁流体波动涡旋流，其中外圆柱在空间均匀磁场中静止，并受到交变调制。使用改进的尼克拉斯近似，在倍周期或逆倍周期的背景下，研究了频率调制对非线性流动动力学和出现的共振现象的影响。本文是主题特刊“泰勒开创性论文发表一百周年之际的泰勒 - 库埃特及相关流动（第1部分）”的一部分。
