A Numerical Study of Vortex Breakdown in Turbulent Swirling Flows  

Oleh:

Spall, Robert E. ; Ashby, Blake M.

Jenis: Article from Bulletin/Magazine
Dalam koleksi: Journal of Fluids Engineering vol. 122 no. 1 (2000), page 179-182.
Topik: numerical method; numerical study; vortex breakdown; turbulent; swirling; flows

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: JJ89.1 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

Lihat Detail Induk

Isi artikel

Solutions to the incompressible Reynolds - averaged Navier – Stokes equations have been obtained for turbulent vortex breakdown within a slightly diverging tube. Inlet boundary conditions were derived from available experimental data for the mean flow and turbulence kinetic energy. The performance of both two - equation and full differential Reynolds stress models was evaluated. Axisymmetric results revealed that the initiation of vortex breakdown was reasonably well predicted by the differential Reynolds stress model. However, the standard K – E model failed to predict the occurrence of breakdown. The differential Reynolds stress model also predicted satisfactorily the mean azimuthal and axial velocity profiles downstream of the breakdown, whereas results using the K – E model were unsatisfactory.

Opini Anda

Klik untuk menuliskan opini Anda tentang koleksi ini!

Kembali