Onset of turbulence in particle-laden pipe flows
Willian Hogendoorn (TU Delft - Multi Phase Systems)
Bidhan Chandra (Indian Institute of Science Education and Research (IISER) Bhopal, TU Delft - Multi Phase Systems)
Christian Poelma (TU Delft - Process and Energy)
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Abstract
We propose a scaling law for the onset of turbulence in pipe flow of neutrally buoyant suspensions. This scaling law, based on a large set of experimental data, relates the amplitude of the particle-induced perturbations ε to the critical suspension Reynolds number Res,c. Here ε is a function of the particle-to-pipe diameter ratio and the volume fraction of the suspended particles, ε=(d/D)1/2ϕ1/6. Res,c is found to scale as ε−1. Furthermore, the perturbation amplitude allows a distinction between classical, intermediate, and particle-induced transitions.