Marie-Pierre Chauve

Batchelor versus Stewartson flow structures in a rotor-stator cavity with throughflow

The present work considers the turbulent flow inside a high-speed rotor-stator cavity with or without superimposed throughflow. New extensive measurements made at IRPHE by a two-component laser Doppler anemometer technique and by pressure transducers are compared to numerical predictions based on one-point statistical modeling using a low-Reynolds-number second-order full stress transport closure (Reynolds stress model). The advanced second-order model provides good predictions for the mean flow as well as for the turbulent field and so is the adequate level of closure to describe such complex flows. A better insight into the dynamics of such flows is also gained from this study. Indeed the transition between a Batchelor type of flow with two boundary layers separated by a central rotating core and a Stewartson type of flow with only one boundary layer on the rotating disk is characterized in the (r*,Ro) plane, where r* is the dimensionless radial location and Ro a modified Rossby number. The 5∕7 power-la...

Turbulent rotating disk flow with inward throughflow

The evolution of the entrainment coefficient

Collective behavior of wakes downstream a row of cylinders

K

Large eddy simulation and measurements of turbulent enclosed rotor-stator flows

of the rotating fluid in a rotor–stator cavity with an inward throughflow and pre-rotation is studied according to the flow parameters. Measurements are obtained in water for a turbulent Batchelor type of flow with two separated boundary layers on the rotating and stationary disks by means of a laser Doppler anemometer, and the results are compared to those performed using pressure transducers. We show that the entrainment coefficient

STABILITY OF A TRAVELING ROLL SYSTEM IN A ROTATING DISK FLOW

K

Centrifugal Flow in a Rotor-Stator Cavity

depends on a local flow rate coefficient

Experimental study of rotating disk instability. I. Natural flow

Cq_r

Experimental study of rotating disk flow instability. II. Forced flow

according to a

Transition to turbulence on a rotating flat disk

5/7

Turbulence modelling and measurements in a rotor-stator system with throughflow

power law whose coefficients depend on the boundary conditions. A theoretical analysis confirms this behaviour of