Instantaneous velocity field measurement in densely-laden two-phase flows using Ultrasound Imaging Velocimetry

Instantaneous velocity field measurement in densely-laden two-phase flows using Ultrasound Imaging Velocimetry

Poelma, C. (TU Delft Multi Phase Systems)
Gurung, A. (TU Delft Fluid Mechanics)

2016

Ultrasound Imaging Velocimetry (UIV, also known as 'echo-PIV') has, since its introduction a decade ago, been regarded as a promising tool to characterize non-transparent flows. Prime application examples are particle-laden flows and (in vivo) blood flow. Virtually all studies so far have been validation/comparison studies in laminar flow. In this contribution, we show that the technique has matured to a state where also unsteady, turbulent flows can be characterized. We do this by performing measurements in a fully-developed (single-phase) turbulent pipe flow at a Reynolds number of 5300. The outcome agrees with literature data. Subsequently, we demonstrate that the technique can measure in the same flow, but now with a moderate volume fraction of particles; such flows are beyond the capabilities of conventional, optical techniques. This opens up a wide range of application areas, such as studies into turbulence modification and sediment transport.

PIV
ultrasound, turbulence
two-phase flows

http://resolver.tudelft.nl/uuid:14761f6f-504d-460a-8f35-2ec836b74060

Instituto Superior Técnico, Lisboa, Portugal

978-989-98777-8-8

Proceedings of the 18th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics

18th International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics, 2016-07-04 → 2016-07-07, The Calouste Gulbenkian Foundation, Lisbon, Portugal

Institutional Repository

conference paper

© 2016 C. Poelma, A. Gurung