4 papers
Subcritical turbulent transition in rotating and curved shear flows
P-Y. Longaretti, O. Dauchot
The effects of global flow rotation and curvature on the subcritical transition to turbulence in shear flows are examined. The relevant time-scales of the problem are identified by…
Linear Stability and Subcritical Turbulence in Rotating Shear Flows
P. -Y. Longaretti
The relation between rotating plane Couette and Taylor-Couette flows is clarified. The identity of their linear stability limits is explained by considering the effect of the Corio…
Pressure- and magnetic shear- driven instabilities in rotating MHD jets
Evy Kersale, Pierre-Yves Longaretti, Guy Pelletier
We derive new stability criteria for purely MHD instabilities in rotating jets, in the framework of the ballooning ordering expansion. Quite unexpectedly, they involve a term which…
Lens reconstruction and source redshift distribution
Pierre-Yves Longaretti
The currently used linear and nonlinear lens inversion techniques are based on distortion estimators whose complicated source redshift dependence makes the influence of the redshif…