منابع مشابه
Oscillating Taylor-Couette Flow
A flow transition in a coaxial rotating cylinder with only inner cylinder rotation was investigated using ultrasonic Doppler method for a wide range of Reynolds number up to 40 times critical Reynolds number (Rc). By analysing spatio-temporal velocity profiles, excitation functions of various transition modes such as wavy and modulated wavy modes were obtained using space-time Fourier expansion...
متن کاملUltimate turbulent Taylor-Couette flow.
The flow structure of strongly turbulent Taylor-Couette flow with Reynolds numbers up to Re(i)=2×10(6) of the inner cylinder is experimentally examined with high-speed particle image velocimetry (PIV). The wind Reynolds numbers Re(w) of the turbulent Taylor-vortex flow is found to scale as Re(w)∝Ta(1/2), exactly as predicted by Grossmann and Lohse [Phys. Fluids 23, 045108 (2011).] for the ultim...
متن کاملLayer Formation in Stratified Taylor–Couette Flow
A new set of high Reynolds number experiments (Re = riΩi∆r ν ∼ 10 − 10) are conducted to examine the layer formation observed in stratified Taylor–Couette flow. A wider range of radius ratios η = ri ro (where ri and ro are the radii of the inner and outer cylinder, respectively) than previously possible is explored to examine the universality of the dependence of layer height l on U N , where U...
متن کاملTurbulent Bursts in Couette-Taylor Flow.
We present a physical explanation of turbulent bursts in the flow between concentric, rotating cylinders (Couette-Taylor flow), based on fully resolved direct numerical calculations. The bursts are a temporal oscillation between a spatially laminar flow and turbulence, discovered experimentally by Hamill et al. The onset of turbulence is shown to be due to a linear instability of the spiral flo...
متن کاملSimulation of Viscoelastic Fluids: Couette–Taylor Flow
We present a numerical scheme for viscoelastic flow based on a second-order central differencing method recently introduced in the context of incompressible newtonian flow; the incompressibility constraint is treated with the projection method. The result is a simple and efficient scheme that is readily adaptable to a wide class of differential constitutive equations and flow geometries. We imp...
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ژورنال
عنوان ژورنال: Scholarpedia
سال: 2009
ISSN: 1941-6016
DOI: 10.4249/scholarpedia.6389