The hydrodynamics of a recirculating (O-tube) flume

Research output: Chapter in Book/Conference paperConference paper

1 Citation (Scopus)

Abstract

An O-tube flume is a horizontal closed-circuit flume that can be driven by an inline impellertype
pump to produce steady and/or oscillatory flow over a mobile seabed. An O-tube has the ability to reproduce
large combined wave and current conditions near the seabed, typical of (cyclonic) storm conditions. In this
paper, we investigate the hydrodynamics of an O-tube and show applications of this technology. First, we derive
a dynamic equation to explain the coupling between pressure and flow rate within the O-tube. This result can
be thought of as an extension of the classical hydrodynamic equations developed for U-tubes and allows for
improved control of the flow within the O-tube by providing a prediction of the non-linear interaction between
steady flow (i.e. currents) and unsteady flow (i.e. waves). We demonstrate this improved control by comparing
measurements of flow rate taken from an O-tube with the dynamic equation. Secondly, we present velocity
measurements to give a detailed description of the flow field within the O-tube, including mean flow profiles
and seabed shear stress. Finally, we conclude the paper by providing two example applications of the facility to
study sediment transport and scour.
Original languageEnglish
Title of host publicationScour and Erosion
Subtitle of host publicationProceedings of the 8th International Conference on Scour and Erosion
EditorsJohn Harris, Richard Whitehouse, Sarah Moxon
PublisherTaylor & Francis
Pages999–1010
ISBN (Electronic)978-1-315-37504-5
ISBN (Print)978-1-138-02979-8
DOIs
Publication statusPublished - 2016
EventInternational Conference on Scour and Erosion - Oxford, United Kingdom
Duration: 12 Sep 201615 Sep 2016

Conference

ConferenceInternational Conference on Scour and Erosion
CountryUnited Kingdom
CityOxford
Period12/09/1615/09/16

Fingerprint

hydrodynamics
oscillating flow
unsteady flow
scour
flow field
shear stress
sediment transport
prediction
rate

Cite this

Mohr, H., Draper, S., White, D., Cheng, L., An, H., & Zhang, Q. (2016). The hydrodynamics of a recirculating (O-tube) flume. In J. Harris, R. Whitehouse, & S. Moxon (Eds.), Scour and Erosion: Proceedings of the 8th International Conference on Scour and Erosion (pp. 999–1010). Taylor & Francis. https://doi.org/10.1201/9781315375045-128
Mohr, Henning ; Draper, Scott ; White, David ; Cheng, Liang ; An, Hongwei ; Zhang, Qin. / The hydrodynamics of a recirculating (O-tube) flume. Scour and Erosion: Proceedings of the 8th International Conference on Scour and Erosion. editor / John Harris ; Richard Whitehouse ; Sarah Moxon. Taylor & Francis, 2016. pp. 999–1010
@inproceedings{38ee2213c72541c6a2d91674667999db,
title = "The hydrodynamics of a recirculating (O-tube) flume",
abstract = "An O-tube flume is a horizontal closed-circuit flume that can be driven by an inline impellertypepump to produce steady and/or oscillatory flow over a mobile seabed. An O-tube has the ability to reproducelarge combined wave and current conditions near the seabed, typical of (cyclonic) storm conditions. In thispaper, we investigate the hydrodynamics of an O-tube and show applications of this technology. First, we derivea dynamic equation to explain the coupling between pressure and flow rate within the O-tube. This result canbe thought of as an extension of the classical hydrodynamic equations developed for U-tubes and allows forimproved control of the flow within the O-tube by providing a prediction of the non-linear interaction betweensteady flow (i.e. currents) and unsteady flow (i.e. waves). We demonstrate this improved control by comparingmeasurements of flow rate taken from an O-tube with the dynamic equation. Secondly, we present velocitymeasurements to give a detailed description of the flow field within the O-tube, including mean flow profilesand seabed shear stress. Finally, we conclude the paper by providing two example applications of the facility tostudy sediment transport and scour.",
author = "Henning Mohr and Scott Draper and David White and Liang Cheng and Hongwei An and Qin Zhang",
year = "2016",
doi = "10.1201/9781315375045-128",
language = "English",
isbn = "978-1-138-02979-8",
pages = "999–1010",
editor = "John Harris and Richard Whitehouse and Sarah Moxon",
booktitle = "Scour and Erosion",
publisher = "Taylor & Francis",
address = "United Kingdom",

}

Mohr, H, Draper, S, White, D, Cheng, L, An, H & Zhang, Q 2016, The hydrodynamics of a recirculating (O-tube) flume. in J Harris, R Whitehouse & S Moxon (eds), Scour and Erosion: Proceedings of the 8th International Conference on Scour and Erosion. Taylor & Francis, pp. 999–1010, International Conference on Scour and Erosion, Oxford, United Kingdom, 12/09/16. https://doi.org/10.1201/9781315375045-128

The hydrodynamics of a recirculating (O-tube) flume. / Mohr, Henning; Draper, Scott; White, David; Cheng, Liang; An, Hongwei; Zhang, Qin.

Scour and Erosion: Proceedings of the 8th International Conference on Scour and Erosion. ed. / John Harris; Richard Whitehouse; Sarah Moxon. Taylor & Francis, 2016. p. 999–1010.

Research output: Chapter in Book/Conference paperConference paper

TY - GEN

T1 - The hydrodynamics of a recirculating (O-tube) flume

AU - Mohr, Henning

AU - Draper, Scott

AU - White, David

AU - Cheng, Liang

AU - An, Hongwei

AU - Zhang, Qin

PY - 2016

Y1 - 2016

N2 - An O-tube flume is a horizontal closed-circuit flume that can be driven by an inline impellertypepump to produce steady and/or oscillatory flow over a mobile seabed. An O-tube has the ability to reproducelarge combined wave and current conditions near the seabed, typical of (cyclonic) storm conditions. In thispaper, we investigate the hydrodynamics of an O-tube and show applications of this technology. First, we derivea dynamic equation to explain the coupling between pressure and flow rate within the O-tube. This result canbe thought of as an extension of the classical hydrodynamic equations developed for U-tubes and allows forimproved control of the flow within the O-tube by providing a prediction of the non-linear interaction betweensteady flow (i.e. currents) and unsteady flow (i.e. waves). We demonstrate this improved control by comparingmeasurements of flow rate taken from an O-tube with the dynamic equation. Secondly, we present velocitymeasurements to give a detailed description of the flow field within the O-tube, including mean flow profilesand seabed shear stress. Finally, we conclude the paper by providing two example applications of the facility tostudy sediment transport and scour.

AB - An O-tube flume is a horizontal closed-circuit flume that can be driven by an inline impellertypepump to produce steady and/or oscillatory flow over a mobile seabed. An O-tube has the ability to reproducelarge combined wave and current conditions near the seabed, typical of (cyclonic) storm conditions. In thispaper, we investigate the hydrodynamics of an O-tube and show applications of this technology. First, we derivea dynamic equation to explain the coupling between pressure and flow rate within the O-tube. This result canbe thought of as an extension of the classical hydrodynamic equations developed for U-tubes and allows forimproved control of the flow within the O-tube by providing a prediction of the non-linear interaction betweensteady flow (i.e. currents) and unsteady flow (i.e. waves). We demonstrate this improved control by comparingmeasurements of flow rate taken from an O-tube with the dynamic equation. Secondly, we present velocitymeasurements to give a detailed description of the flow field within the O-tube, including mean flow profilesand seabed shear stress. Finally, we conclude the paper by providing two example applications of the facility tostudy sediment transport and scour.

U2 - 10.1201/9781315375045-128

DO - 10.1201/9781315375045-128

M3 - Conference paper

SN - 978-1-138-02979-8

SP - 999

EP - 1010

BT - Scour and Erosion

A2 - Harris, John

A2 - Whitehouse, Richard

A2 - Moxon, Sarah

PB - Taylor & Francis

ER -

Mohr H, Draper S, White D, Cheng L, An H, Zhang Q. The hydrodynamics of a recirculating (O-tube) flume. In Harris J, Whitehouse R, Moxon S, editors, Scour and Erosion: Proceedings of the 8th International Conference on Scour and Erosion. Taylor & Francis. 2016. p. 999–1010 https://doi.org/10.1201/9781315375045-128