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A three-dimensional PSME model for rotating flows in an annular cavity |
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| Authors: | Ming-Jyh Chern Alistair G.L. Borthwick |
| Affiliation: | 1. Department of Mechanical Engineering , National Taiwan University of Science and Technology , 43 Sec. 4 Keelung Road, Taipei , 10607 , Taiwan;2. Ecological Engineering Research Unit, National Taiwan University , No. 1 Sec. 4 Roosevelt Road, Taipei , 10617 , Taiwan;3. Department of Civil and Environmental Engineering , University College Cork , Cork , Ireland |
| Abstract: | A pseudospectral matrix-element (PSME) numerical model is described for the simulation of rotating flows in a three-dimensional annular cavity. Temporal discretisation is implemented using a second-order semi-implicit scheme. Modified compressibility is invoked to handle the coupling between velocity and pressure while maintaining the incompressibility constraint. The governing continuity and Navier–Stokes momentum equations and boundary conditions are discretised using Chebyshev and Fourier collocation formulae. The model is validated against numerical results from alternative schemes and experimental data on rotating flows in an annular cavity. A base flow regime and instability patterns are observed, in accordance with other previously published investigations. It is demonstrated that the PSME model provides an accurate representation of rotating flows in an annular cavity. |
| Keywords: | PSME method rotor–stator cavity viscous flows flow instability modified compressibility method |