منابع مشابه
Intermittency in spiral Poiseuille flow
The results of an experimental study on intermittent spiral vortices observed in a counter-rotating Taylor-Couette system with an additional axial through flow, i.e. SpiralPoiseuille flow, are presented. Convectively unstable upstream propagating spiral vortices appear in the laminar basic flow from an oscillatory instability and in general become absolutely unstable at higher inner cylinder Re...
متن کاملImperfect Hopf bifurcation in spiral Poiseuille flow.
We present the results of an experimental study on the transition to spiral vortices in flow between concentric counter-rotating cylinders in the presence of an axial through-flow, i.e., in spiral Poiseuille flow. The experiments were performed in an apparatus having an aspect ratio Gamma=L/d=22.8 ( L axial length, d gap width between cylinders) and end plates enabling an in and outflow of mass...
متن کاملDouble Hopf bifurcation in corotating spiral Poiseuille flow
Nonlinear dynamics of the spiral Poiseuille problem for moderate axial through flow is investigated numerically within the corotating regime for medium gap geometry. The neighborhood of a double Hopf bifurcation point of the linear stability boundary, where spiral waves of opposite axial phase propagation compete, is explored by accurately solving time-dependent Navier-Stokes equations with a s...
متن کاملConvective and absolute instabilities in counter-rotating spiral Poiseuille flow
We present results of an experimental study on the stability of Taylor–Couette flow in case of counter-rotating cylinders and an imposed axial through flow. We are able to confirm results form recent numerical investigations done by Pinter et al. [24] by measuring the absolute and convective stability boundaries of both propagating Taylor vortices (PTV) and spiral vortices (SPI). Thus our work ...
متن کاملOn the stability of medium gap corotating spiral Poiseuille flow
New features of the linear stability of the spiral Poiseuille flow for a wide range of inner and outer independent rotation speeds of the cylinders and imposed axial pressure gradient are investigated. The analysis is focused on the corotating situation and for a particular radius ratio =0.5. Unexpected changes in the angle of the bifurcated spiral regimes are found for moderate values of the a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2005
ISSN: 1742-6588,1742-6596
DOI: 10.1088/1742-6596/14/1/012