This contribution presents new phenomena regarding the stability of pressure driven flows within annular pipes. The fluid is advected downstream due to an axial pressure gradient but also subjected to centrifugal mechanisms due to the independent rotation of the coaxial cylinders that contain it. Coexistence of upstream and downstream spiral secondary flows is observed in the co-rotating regime...

Wrinkling of an inextensible elastic lining inner-lined tube under imposed pressure is considered. A simple equation modeling the properties lining, pressure, and soft-substrate forces derived. This aims to capture wrinkling response arterial endothelium blood changes. Numerical continuation used construct a bifurcation diagram as function for in-plane deformations, in excellent agreement with ...

In the past, a great deal of attention has been drawn to thermal driven denaturation processes. In recent years, however, the discovery of stress-induced denaturation, observed at the one-molecule level, has revealed new insights into the complex phenomena involved in the thermo-mechanics of DNA function. Understanding the effect of local pressure variations in DNA stability is thus an appealin...