Experimental study of the flow in the cavity between rotating discs

✍ Scribed by X.P. Gan; S.A. MacGregor

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 106 KB
• Volume: 7
• Category: Article
• ISSN: 0894-1777
• DOI: 10.1016/0894-1777(93)90201-s

✦ Synopsis

Oscillatory flow in a two-dimensional sinusoidal wavywalled channel is investigated experimentally. Attention is focused on the transition of two-dimensional to threedimensional flow. The critical value of the Reynolds number at the onset of three-dimensional flow strongly depends on the Strouhal number. The flow is most unstable in the range of Strouhal numbers between 0.02 and 0.03. Two distinct three-dimensional flows are formed and their distinction can be made only by whether the Strouhal number exceeds about 0.02. Steady flow is free from the transition, which is due to a three-dimensional centrifugal instability of the flow.