VDM Deng, D: Numerical and Experimental Taylor Flow Instabilitie

Numerical and Experimental Taylor Flow Instabilities presents the relationship between the onset of Taylor instability and appearance of what is commonly known as turbulence in narrow gaps between two cylinders. A question open to debate is whether the flow formations observed during Taylor instability regimes are, or are related to the actual turbulence as it is presently modeled in micro-scale clearance flows. FEATURES Flow patterns, velocity profiles and torques are presented in both Taylor and wavy vortex regimes. The formation and collapse of Taylor and wavy vortices are clearly observed. A new model for predicting the flow behavior in long and short journal bearing films in the transition regime is proposed and verified. A comparison is made between the results of this model and the four most accepted turbulence models (Constantinescu, Ng- Pan, Hirs and Gross et al.).