| Abstract
| - Flow between two concentric cylinders, with either or both of them rotating, has potential advantages overthe conventional process equipment. This flow, which is also termed Taylor−Couette flow and exhibits avariety of flow regimes, has been studied using computational fluid dynamics (CFD) simulations. The onsetof centrifugal instability, the various cell patterns, and the velocity profiles have been predicted and comparedwith the available experimental data. To extend the base of experimental information, new measurementshave been made using laser Doppler velocimetry (LDV) and particle image velocimetry (PIV). For the entirerange of experimental data, the Reynolds stress model (RSM) was determined to exhibit good predictiveability for the mean components of velocity and the turbulent kinetic energy. The wavelengths of the vorticesin various regimes have also been determined using CFD and were observed to be in good conformity withall the available experimental results. Furthermore, very good agreement between the predicted energydissipation rate with the energy input rate was observed over a wide range of speeds and annular gaps.
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