Stability of the non‐isothermal flow between co‐ and counter‐rotating disks
Abstrak
AbstractThe 3D DNS computations are performed to study the isothermal and not‐isothermal transitional flow between two co‐ and counter‐rotating disks enclosed by two rotating cylinders. Computations have been performed for the wide range of Reynolds numbers and different end‐wall conditions including throughflow. For chosen examples 3D LES computations are performed. The flow is described by 3D Navier‐Stokes, energy and continuity equations. Numerical computations are based on a pseudospectral Chebyshev‐Fourier method. The time scheme is semi‐implicit and second‐order accurate. For LES computations, a Lagrangian dynamic sub‐grid model is used. In this paper we studied the spatial structures, which appeared in different stages of the lam.‐turb. transition process. We considered cavities of the aspect ratio 9 and curvature parameters Rm=1.5–3.0. Influence of the thermal Rossby number on lam.‐turb. transition process was also investigated. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Penulis (2)
Artur Zielinski
Ewa Tuliszka‐Sznitko
Akses Cepat
- Tahun Terbit
- 2007
- Bahasa
- en
- Sumber Database
- CrossRef
- DOI
- 10.1002/pamm.200700112
- Akses
- Open Access ✓