We consider high Reynolds number supersonic flow over a compression ramp in the triple-deck formulation. Previous studies of compression-ramp stability have shown rapid growth high-frequency disturbances initial-value computations; however, no physical or numerical origin has yet been identified robustly. By considering linear perturbations to steady solutions, we show that instabilities observ...

Abstract The majority of hemorrhagic strokes are caused by cerebral aneurysms, harboured in a large portion the human population. Currently, it is unclear what constitutes dangerous aneurysm, and risk rupture such aneurysms challenging to quantify. Previous studies have shown that flow dynamics play an important role development aneurysms. However, there varying consensus on blood patterns stab...

The Oldroyd-B model has been used extensively to predict a host of instabilities in shearing flows viscoelastic fluids, often realized experimentally using polymer solutions. present review, written on the occasion birth centenary James Oldroyd, provides an overview found across major classes flows. These comprise (i) canonical rectilinear including plane Couette, and pipe Poiseuille flows; (ii...