STABILITY OF INDUCED DEVELOPING FLOWS IN CONCENTRIC ANNULI WITH 2 ROTATING BOUNDARIES

This paper investigates hydrodynamic instability of the Taylor-Vortex type in induced developing natural convection flows in vertical concen tric annuli with two rotating boundaries. The induced flow is created by heating one of the annulus boundaries either isothermally or at a c onstant heat flux while the other annulus boundary is kept adiabatic. The hydrodynamic instability is detected by means of a local stability parameter. This local stability parameter could predict the stabilizi ng effect of rotating the outer cylinder. The paper gives also more in sight into the features of the local stability parameter.