Fr.: instabilité séculaire
Instability caused by a slow dissipation of energy.
Fr.: instabilité de Taylor-Couette
A hydrodynamic instability in the → Taylor-Couette flow that arises when the rotation velocity of the fluid exceeds a critical value. The instability arises for → Taylor numbers larger than about 1700. At the beginning the fluid elements will move in simple rolls, but turbulence in the form of complex spirals will appear with increasing rotation velocity.