Transient Growth in Rayleigh-Bénard-Poiseuille/Couette flows

Studying the spanwise velocity at the channel centerline, Henningson and Kim 18 observed that there is a mean motion out from the spot toward the wing tips and that this outward

The right panel of figure 15 shows that this flow stays directed parallel to the turbulent segment in its central portion, much like along the continuous band in the left panel,

The fact that for all the three types of response, the maximum energy amplification is obtained by streamwise uniform structures (α = 0) is in accordance with the sim- ilar analyses

Refined Large-Eddy Simulation results, using the WALE model Nicoud & Ducros (1999), hold for reference data, whereas the efficiency of a RANS model, the Elliptic Blending

These variations eventually modify the nature of the subcritical flow which can evolve from suction to injection (cross flow reversal) or consume the whole axial flow (axial

Continuation to C s = 0 and then in Re (black line, dashed) show that solutions continued from the turbulent case (square symbols) belong to the Nagata-Busse-Clever-Waleffe branch

Even if the amplitude of the axial component of velocity gradient has its maximum at the forward critical point, the oscillations of absolute value velocity gradient are

Taylor vortex flow, wavy vortex flow, helical flow having screw opposite to the basic Couette Poiseuille (CT) flow and moving in the direction of the Poiseuille