Phys. Rev. Lett. 90, 014501 (2003) [4 pages]Transition to Turbulence in Particulate Pipe FlowReceived 19 December 2001; published 10 January 2003 We investigate experimentally the influence of suspended particles on the transition to turbulence. The particles are monodisperse and neutrally buoyant with the liquid. The role of the particles on the transition depends upon both the pipe to particle diameter ratios and the concentration. For large pipe-to-particle diameter ratios the transition is delayed while it is lowered for small ratios. A scaling is proposed to collapse the departure from the critical Reynolds number for pure fluid as a function of concentration into a single master curve. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.014501
DOI:
10.1103/PhysRevLett.90.014501
PACS:
47.20.–k, 83.50.Ha, 83.80.Hj
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