Numerical simulation of turbulence suppression: Comparisons of the performance of four k-ϵ turbulence models

✍ Scribed by J.C.S. Lai; C.Y. Yang

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 801 KB
• Volume: 18
• Category: Article
• ISSN: 0142-727X
• DOI: 10.1016/s0142-727x(97)00003-9

✦ Synopsis

The standard k-e model and three low-Reynolds number k-e models were used to simulate pipe flow with a ring device installed in the near-wall region. Both developing and fully developed turbulenll pipe flows have been investigated. Turbulence suppression for fully developed pipe flows revealed by hot-wire measurements has been predicted with all three low-Reynolds number models, and turbulence enhancement has been predicted by thp standard k-e model. All three low-Reynolds number models have predicted similar distributions of velocities, turbulence kinetic energy, and dissipation rate. For developing pipe flows, the region of turbulence suppression predicted by the three low-Reynolds number models is much more extensive (up to 30 pipe diameters downstream of the device) than for full dew,qoped flow; whereas the standard k-s model has only predicted turbulence enhancement:.