All Outputs (61)

Scaling analysis of multipulsed turbidity current evolution with application to turbidite interpretation (2018)
Journal Article
Ho, V. L., Dorrell, R. M., Keevil, G. M., Burns, A. D., & McCaffrey, W. D. (2018). Scaling analysis of multipulsed turbidity current evolution with application to turbidite interpretation. Journal of Geophysical Research: Oceans, 123(5), 3668-3684. https://doi.org/10.1029/2017jc013463

Deposits of submarine turbidity currents, turbidites, commonly exhibit upward‐fining grain size profiles reflecting deposition under waning flow conditions. However, more complex grading patterns such as multiple cycles of inverse‐to‐normal grading a... Read More about Scaling analysis of multipulsed turbidity current evolution with application to turbidite interpretation.

Particle Size Distribution Controls the Threshold Between Net Sediment Erosion and Deposition in Suspended Load Dominated Flows (2018)
Journal Article
Dorrell, R. M., Amy, L. A., Peakall, J., & McCaffrey, W. D. (2018). Particle Size Distribution Controls the Threshold Between Net Sediment Erosion and Deposition in Suspended Load Dominated Flows. Geophysical research letters, 45(3), 1443-1452. https://doi.org/10.1002/2017gl076489

©2018. American Geophysical Union. All Rights Reserved. The central problem of describing most environmental and industrial flows is predicting when material is entrained into, or deposited from, suspension. The threshold between erosional and deposi... Read More about Particle Size Distribution Controls the Threshold Between Net Sediment Erosion and Deposition in Suspended Load Dominated Flows.

A novel mixing mechanism in sinuous seafloor channels: Implications for submarine channel evolution (2017)
Journal Article
Dorrell, R. M., Peakall, J., Burns, C., & Keevil, G. M. (2018). A novel mixing mechanism in sinuous seafloor channels: Implications for submarine channel evolution. Geomorphology, 303, 1-12. https://doi.org/10.1016/j.geomorph.2017.11.008

Previous experimental studies of density currents in sinuous seafloor channels have almost exclusively studied hydrodynamics either by considering time independent, instantaneous, flow measurements or by compiling time-averaged flow measurements. Her... Read More about A novel mixing mechanism in sinuous seafloor channels: Implications for submarine channel evolution.

Novel 3D sequence stratigraphic numerical model for syn-rift basins : analysing architectural responses to eustasy, sedimentation and tectonics (2017)
Journal Article
Barrett, B., Hodgson, D. M., Collier, R., & Dorrell, R. (2018). Novel 3D sequence stratigraphic numerical model for syn-rift basins : analysing architectural responses to eustasy, sedimentation and tectonics. Marine and Petroleum Geology, 92, 270-284. https://doi.org/10.1016/j.marpetgeo.2017.10.026

Syn-rift clastic sedimentary systems preserve a complicated stratigraphic architecture that records the interplay of tectonics, eustatic sea level and storage and routing of sediments. Previous conceptual models describe and explain changes in deposi... Read More about Novel 3D sequence stratigraphic numerical model for syn-rift basins : analysing architectural responses to eustasy, sedimentation and tectonics.

Pulse propagation in turbidity currents (2017)
Journal Article
Ho, V. L., Dorrell, R. M., Keevil, G. M., Burns, A. D., & McCaffrey, W. D. (2018). Pulse propagation in turbidity currents. Sedimentology, 65(2), 620-637. https://doi.org/10.1111/sed.12397

© 2017 The Authors. Sedimentology © 2017 International Association of Sedimentologists Submarine turbidity currents are a key mechanism in the transportation of clastic sediments to deep seas. Such currents may initiate with a complex longitudinal fl... Read More about Pulse propagation in turbidity currents.

A 3D forward stratigraphic model of fluvial meander-bend evolution for prediction of point-bar lithofacies architecture (2017)
Journal Article
Yan, N., Mountney, N. P., Colombera, L., & Dorrell, R. M. (2017). A 3D forward stratigraphic model of fluvial meander-bend evolution for prediction of point-bar lithofacies architecture. Computers & geosciences, 105, 65-80. https://doi.org/10.1016/j.cageo.2017.04.012

© 2017 Elsevier Ltd Although fundamental types of fluvial meander-bend transformations – expansion, translation, rotation, and combinations thereof – are widely recognised, the relationship between the migratory behaviour of a meander bend, and its r... Read More about A 3D forward stratigraphic model of fluvial meander-bend evolution for prediction of point-bar lithofacies architecture.

Flow dynamics and mixing processes in hydraulic jump arrays: Implications for channel-lobe transition zones (2016)
Journal Article
Dorrell, R., Peakall, J., Sumner, E. J., Parsons, D. R., Darby, S. E., Wynn, R. B., Özsoy, E., & Tezcan, D. (2016). Flow dynamics and mixing processes in hydraulic jump arrays: Implications for channel-lobe transition zones. Marine Geology, 381, 181-193. https://doi.org/10.1016/j.margeo.2016.09.009

© 2016 The Authors A detailed field investigation of a saline gravity current in the southwest Black Sea has enabled the first complete analysis of three-dimensional flow structure and dynamics of a series of linked hydraulic jumps in stratified, den... Read More about Flow dynamics and mixing processes in hydraulic jump arrays: Implications for channel-lobe transition zones.

Keynote speech - Validation of numerically generated stratigraphic architecture (2016)
Presentation / Conference Contribution
Mountney, N., Colombera, L., Yan, N., Dorrell, R. M., & McCaffrey, W. D. (2016, April). Keynote speech - Validation of numerically generated stratigraphic architecture. Presented at 2nd Conference on Forward Modelling of Sedimentary Systems: From Desert to Deep Marine Depositioned Systems

The inherent instability of leveed seafloor channels (2015)
Journal Article
Dorrell, R. M., Burns, A. D., & McCaffrey, W. D. (2015). The inherent instability of leveed seafloor channels. Geophysical research letters, 42(10), 4023-4031. https://doi.org/10.1002/2015GL063809

©2015. American Geophysical Union. All Rights Reserved. New analytical models demonstrate that under aggradational flow conditions, seafloor channel-levee systems are inherently unstable; both channel area and stability necessarily decrease at long t... Read More about The inherent instability of leveed seafloor channels.

Comment on “A simple model for vertical profiles of velocity and suspended sediment concentration in straight and curved submarine channels” by M. Bolla Pittaluga and J. Imran (2014)
Journal Article
Peakall, J., Darby, S. E., Dorrell, R. M., Parsons, D. R., Sumner, E. J., Wynn, R. B., Imran, J., & Bolla Pittaluga, M. (2014). Comment on “A simple model for vertical profiles of velocity and suspended sediment concentration in straight and curved submarine channels” by M. Bolla Pittaluga and J. Imran. Journal of Geophysical Research: Earth Surface, 119(9), 2070-2073. https://doi.org/10.1002/2014JF003211

This article is a comment on Bolla Pittaluga and Imran [] doi: 10.1002/2013JF002812.

Optimised mixing and flow resistance during shear flow over a rib roughened boundary (2014)
Journal Article
Arfaie, A., Burns, A., Dorrell, R., Eggenhuisen, J., Ingham, D., & McCaffrey, W. (2014). Optimised mixing and flow resistance during shear flow over a rib roughened boundary. International communications in heat and mass transfer, 58, 54-62. https://doi.org/10.1016/j.icheatmasstransfer.2014.08.005

A series of numerical investigations has been performed to study the effect of lower boundary roughness on turbulent flow in a two-dimensional channel. The roughness spacing to height ratio, w/k, has been investigated over the range 0.12 to 402 by va... Read More about Optimised mixing and flow resistance during shear flow over a rib roughened boundary.

Hydrodynamics of fossil fishes (2014)
Journal Article
Fletcher, T., Altringham, J., Peakall, J., Wignall, P., & Dorrell, R. (2014). Hydrodynamics of fossil fishes. Proceedings of the Royal Society B: Biological Sciences, 281(1788), 20140703-20140703. https://doi.org/10.1098/rspb.2014.0703

From their earliest origins, fishes have developed a suite of adaptations for locomotion in water, which determine performance and ultimately fitness. Even without data from behaviour, soft tissue and extant relatives, it is possible to infer a wealt... Read More about Hydrodynamics of fossil fishes.

The critical role of stratification in submarine channels: Implications for channelization and long runout of flows (2014)
Journal Article
Dorrell, R. M., Darby, S. E., Peakall, J., Sumner, E. J., Parsons, D. R., & Wynn, R. B. (2014). The critical role of stratification in submarine channels: Implications for channelization and long runout of flows. Journal of Geophysical Research: Oceans, 119(4), 2620-2641. https://doi.org/10.1002/2014jc009807

Channelized submarine gravity currents travel remarkable distances, transporting sediment to the distal reaches of submarine fans. However, the mechanisms by which flows can be sustained over these distances remain enigmatic. In this paper we conside... Read More about The critical role of stratification in submarine channels: Implications for channelization and long runout of flows.

Autonomous Underwater Vehicles (AUVs): Their past, present and future contributions to the advancement of marine geoscience (2014)
Journal Article
Wynn, R. B., Huvenne, V. A., Le Bas, T. P., Murton, B. J., Connelly, D. P., Bett, B. J., Ruhl, H. A., Morris, K. J., Peakall, J., Parsons, D. R., Sumner, E. J., Darby, S. E., Dorrell, R. M., & Hunt, J. E. (2014). Autonomous Underwater Vehicles (AUVs): Their past, present and future contributions to the advancement of marine geoscience. Marine Geology, 352, 451-468. https://doi.org/10.1016/j.margeo.2014.03.012

Autonomous Underwater Vehicles (AUVs) have a wide range of applications in marine geoscience, and are increasingly being used in the scientific, military, commercial, and policy sectors. Their ability to operate autonomously of a host vessel makes th... Read More about Autonomous Underwater Vehicles (AUVs): Their past, present and future contributions to the advancement of marine geoscience.

Driven around the bend: spatial evolution and controls on the orientation of helical bend flow in a natural submarine gravity current (2014)
Journal Article
Sumner, E. J., Peakall, J., Dorrell, R. M., Parsons, D. R., Darby, S. E., Wynn, R. B., McPhail, S. D., Perrett, J., Webb, A., & White, D. (2014). Driven around the bend: spatial evolution and controls on the orientation of helical bend flow in a natural submarine gravity current. Journal of Geophysical Research: Oceans, 119(2), 898-913. https://doi.org/10.1002/2013jc009008

Submarine channel systems transport vast amounts of terrestrial sediment into the deep sea. Understanding the dynamics of the gravity currents that create these systems, and in particular, how these flows interact with and form bends, is fundamental... Read More about Driven around the bend: spatial evolution and controls on the orientation of helical bend flow in a natural submarine gravity current.

First direct measurements of hydraulic jumps in an active submarine density current (2013)
Journal Article
Sumner, E. J., Peakall, J., Parsons, D. R., Wynn, R. B., Darby, S. E., Dorrell, R. M., McPhail, S. D., Perrett, J., Webb, A., & White, D. (2013). First direct measurements of hydraulic jumps in an active submarine density current. Geophysical research letters, 40(22), 5904-5908. https://doi.org/10.1002/2013gl057862

For almost half a century, it has been suspected that hydraulic jumps, which consist of a sudden decrease in downstream velocity and increase in flow thickness, are an important feature of submarine density currents such as turbidity currents and deb... Read More about First direct measurements of hydraulic jumps in an active submarine density current.

Polydisperse suspensions: Erosion, deposition, and flow capacity (2013)
Journal Article
Dorrell, R. M., Hogg, A. J., & Pritchard, D. (2013). Polydisperse suspensions: Erosion, deposition, and flow capacity. Journal of Geophysical Research: Earth Surface, 118(3), 1939-1955. https://doi.org/10.1002/jgrf.20129

Deposition from particle-laden flows is often described in terms of the capacity and competence of the flow, but robust definitions of these terms have proved elusive. In this paper we provide a mathematical modeling framework within which erosion an... Read More about Polydisperse suspensions: Erosion, deposition, and flow capacity.

Superelevation and overspill control secondary flow dynamics in submarine channels (2013)
Journal Article
Dorrell, R. M., Darby, S. E., Peakall, J., Sumner, E. J., Parsons, D. R., & Wynn, R. B. (2013). Superelevation and overspill control secondary flow dynamics in submarine channels. Journal of Geophysical Research: Oceans, 118(8), 3895-3915. https://doi.org/10.1002/jgrc.20277

In subaerial and submarine meander bends, fluid flow travels downstream in a helical spiral, the structure of which is determined by centrifugal, hydrostatic, baroclinic, and Coriolis forces that together balance frictional stresses generated by the... Read More about Superelevation and overspill control secondary flow dynamics in submarine channels.

Length and time scales of response of sediment suspensions to changing flow conditions (2011)
Journal Article
Dorrell, R. M., & Hogg, A. J. (2012). Length and time scales of response of sediment suspensions to changing flow conditions. Journal of Hydraulic Engineering, 138(5), 430-439. https://doi.org/10.1061/%28asce%29hy.1943-7900.0000532

Turbulent suspensions of sediment are investigated to establish the characteristic length and time scales on which they adjust from one state to another. The suspensions are modeled by using a simple closure for the turbulent fluctuations in which th... Read More about Length and time scales of response of sediment suspensions to changing flow conditions.

The structure of the deposit produced by sedimentation of polydisperse suspensions (2011)
Journal Article
Dorrell, R. M., Hogg, A. J., Sumner, E. J., & Talling, P. J. (2011). The structure of the deposit produced by sedimentation of polydisperse suspensions. Journal of Geophysical Research: Earth Surface, 116(F1), https://doi.org/10.1029/2010jf001718

To interpret the deposits from particle-laden flows it is necessary to understand particle settling at their base. In this paper a quantitative model is developed that not only captures how particles settle out of suspension but also the composition... Read More about The structure of the deposit produced by sedimentation of polydisperse suspensions.