Sébastien Poncet

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

Numerical modeling of heat transfer and fluid flow in rotor-stator cavities with throughflow

K

Force measurements on rising bubbles

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

Review of fluid flow and convective heat transfer within rotating disk cavities with impinging jet

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Combination of nanofluid and inserts for heat transfer enhancement

depends on a local flow rate coefficient

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

Cq_r

Centrifugal Flow in a Rotor-Stator Cavity

according to a

An immersed boundary-lattice Boltzmann method for single- and multi-component fluid flows

5/7

Revisiting the two first instabilities of the flow in an annular rotor-stator cavity

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