This paper investigates the global instability of supersonic ramp flow at Mach number 4.8 at different Reynolds numbers through direct numerical simulations. It is found that a critical Reynolds number exist for the flow to become globally unstable. Transition to turbulent happens downstream of the ramp with strong intermittency and is due to the breakdown of streaky structures fed by instabili...

Related Articles The final stages of capillary break-up of polymer solutions Phys. Fluids 24, 023101 (2012) Effects of particles on stability of flow-induced precursors J. Chem. Phys. 136, 054903 (2012) Kelvin-Helmholtz instability in viscoelastic fluids in presence of electro-magnetic fields Phys. Fluids 23, 094107 (2011) Electrohydrodynamic instabilities in thin liquid trilayer films Phys. Fl...

Using harmonic differential quadrature (HDQ) method, nonlinear vibrations and instability of a smart composite cylindrical shell made from piezoelectric polymer of polyvinylidene fluoride (PVDF) reinforced with boron nitride nanotubes (BNNTs) are investigated while clamped at both ends and subjected to combined electro-thermo-mechanical loads and conveying a viscous-fluid. The mathematical mode...

The transport of angular momentum in the outward direction is the fundamental requirement for accretion to proceed in an accretion disk. This objective can be achieved if the accretion flow is turbulent. Instabilities are one of the sources for the turbulence. We study a differentially rotating compressive flow in the presence of nonvanishing radial and azimuthal magnetic field and demonstrate ...