Scaling of turbulence intensity for low-speed flow in smooth pipes

In this paper, we compare measured, modelled, and simulated mean velocity profiles. Smooth pipe flow simulations are performed for both incompressible (below Mach 0.2) and compressible (below Mach 0.1) fluids. The compressible simulations align most closely with the measurements. The simulations are...

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Bibliographic Details
Published in:Flow measurement and instrumentation 2016-12, Vol.52, p.101-114
Main Authors: Russo, Francesco, Basse, Nils T.
Format: Article
Language:English
Subjects:
CFD simulations
Flow in smooth pipes
Flowmeters
Incompressible and compressible flow
Princeton Superpipe measurements
Semi-empirical modelling
Turbulence intensity scaling
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Summary:In this paper, we compare measured, modelled, and simulated mean velocity profiles. Smooth pipe flow simulations are performed for both incompressible (below Mach 0.2) and compressible (below Mach 0.1) fluids. The compressible simulations align most closely with the measurements. The simulations are subsequently used to make scaling formulae of the turbulence intensity as a function of the Reynolds number. These scaling expressions are compared to scaling derived from measurements. Finally, the found compressible scaling laws are used as an example to show how the flow noise in a flowmeter is expected to scale with the mean flow velocity. •We compare measured, modelled and simulated mean velocity profiles.•Incompressible and compressible simulations are performed and compared to modelling and measurements.•Scaling expressions for the turbulence intensity as a function of the Reynolds number are derived using both simulations and measurements.
ISSN:0955-5986
1873-6998
DOI:10.1016/j.flowmeasinst.2016.09.012