All Outputs (49)

Influence of Coriolis force upon bottom boundary layers in a large‐scale gravity current experiment: Implications for evolution of sinuous deep‐water channel systems (2020)
Journal Article
Davarpanah Jazi, S., Wells, M., Peakall, J., Dorrell, R., Thomas, R., Keevil, G., …Valran, T. (2020). Influence of Coriolis force upon bottom boundary layers in a large‐scale gravity current experiment: Implications for evolution of sinuous deep‐water channel systems. Journal of Geophysical Research: Oceans, 125(3), https://doi.org/10.1029/2019JC015284

Oceanic density currents in many deep-water channels are strongly influenced by the Coriolis force. The dynamics of the bottom-boundary layer in large geostrophic flows, and low Rossby number turbidity currents, are very important for determining the... Read More about Influence of Coriolis force upon bottom boundary layers in a large‐scale gravity current experiment: Implications for evolution of sinuous deep‐water channel systems.

Pulse propagation in gravity currents (2020)
Journal Article
Allen, P. A., Dorrell, R. M., Harlen, O. G., Thomas, R. E., & McCaffrey, W. D. (2020). Pulse propagation in gravity currents. Physics of Fluids, 32(1), Article 016603. https://doi.org/10.1063/1.5130576

Real world gravity current flows rarely exist as a single discrete event, but are instead made up of multiple surges. This paper examines the propagation of surges as pulses in gravity currents. Using theoretical shallow-water modeling, we analyze th... Read More about Pulse propagation in gravity currents.

Quantifying faulting and base level controls on syn-rift sedimentation using stratigraphic architectures of coeval, adjacent Early-Middle Pleistocene fan deltas in Lake Corinth, Greece (2019)
Journal Article
Barrett, B. J., Collier, R. E., Hodgson, D. M., Gawthorpe, R. L., Dorrell, R. M., & Cullen, T. M. (in press). Quantifying faulting and base level controls on syn-rift sedimentation using stratigraphic architectures of coeval, adjacent Early-Middle Pleistocene fan deltas in Lake Corinth, Greece. Basin Research, https://doi.org/10.1111/bre.12356

Quantification of allogenic controls in rift basin‐fills requires analysis of multiple depositional systems because of marked along‐strike changes in depositional architecture. Here, we compare two coeval Early‐Middle Pleistocene syn‐rift fan deltas... Read More about Quantifying faulting and base level controls on syn-rift sedimentation using stratigraphic architectures of coeval, adjacent Early-Middle Pleistocene fan deltas in Lake Corinth, Greece.

Self-sharpening induces jet-like structure in seafloor gravity currents (2019)
Journal Article
Dorrell, R. M., Peakall, J., Darby, S. E., Parsons, D. R., Johnson, J., Sumner, E. J., …Tezcan, D. (2019). Self-sharpening induces jet-like structure in seafloor gravity currents. Nature communications, 10(1), Article 1381. https://doi.org/10.1038/s41467-019-09254-2

Gravity currents are the primary means by which sediments, solutes and heat are transported across the ocean-floor. Existing theory of gravity current flow employs a statistically-stable model of turbulent diffusion that has been extant since the 196... Read More about Self-sharpening induces jet-like structure in seafloor gravity currents.

The structure and entrainment characteristics of partially-confined gravity currents (2019)
Journal Article
Kelly, R. W., Dorrell, R. M., Burns, A. D., & McCaffrey, W. D. (2019). The structure and entrainment characteristics of partially-confined gravity currents. Journal of Geophysical Research: Oceans, 124(3), 2110-2125. https://doi.org/10.1029/2018JC014042

Seafloor channels are the main conduit for turbidity currents transporting sediment to the deep ocean and they can extend for thousands of kilometres along the ocean floor. Although it is common for channel‐traversing turbidity currents to spill onto... Read More about The structure and entrainment characteristics of partially-confined gravity currents.

Dynamics and Deposition of Sediment-Bearing Multi- Pulsed Flows and Geological Implication (2019)
Journal Article
Ho, V. L., Dorrell, R. M., Keevil, G. M., Thomas, R. E., Burns, A. D., Baas, J. H., & McCaffrey, W. D. (2019). Dynamics and Deposition of Sediment-Bearing Multi- Pulsed Flows and Geological Implication. Journal of Sedimentary Research, 8(11), 1127-1139. https://doi.org/10.2110/jsr.2019.62

Copyright © 2019, SEPM (Society for Sedimentary Geology) Previous studies on dilute, multi-pulsed, subaqueous saline flows have demonstrated that pulses will inevitably advect forwards to merge with the flow front. On the assumption that pulse mergin... Read More about Dynamics and Deposition of Sediment-Bearing Multi- Pulsed Flows and Geological Implication.

Inflation of ponded, particulate laden density currents (2018)
Journal Article
Dorrell, R. M., Patacci, M., & McCaffrey, W. D. (2018). Inflation of ponded, particulate laden density currents. Journal of Sedimentary Research, 88(11), 1276-1282. https://doi.org/10.2110/jsr.2018.65

Field-based, physical modeling and analytical research approaches currently suggest that topographically confined particle-laden density currents commonly inflate to produce suspension clouds that generate tabular and texturally homogeneous sedimenta... Read More about Inflation of ponded, particulate laden density currents.

Optimisation of flow resistance and turbulent mixing over bed forms (2018)
Journal Article
Arfaie, A., Burns, A., Dorrell, R., Ingham, D., Eggenhuisen, J., & McCaffrey, W. (2018). Optimisation of flow resistance and turbulent mixing over bed forms. Environmental modelling & software : with environment data news, 107, 141-147. https://doi.org/10.1016/j.envsoft.2018.06.002

Previous work on the interplay between turbulent mixing and flow resistance for flows over periodic rib roughness elements is extended to consider the flow over idealized shapes representative of naturally occurring sedimentary bed forms. The primary... Read More about Optimisation of flow resistance and turbulent mixing over bed forms.

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., …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)
Conference Proceeding
Mountney, N., Colombera, L., Yan, N., Dorrell, R. M., & McCaffrey, W. D. (2016). Keynote speech - Validation of numerically generated stratigraphic architecture. In Second Conference on Forward Modelling of Sedimentary Systems (120-124). https://doi.org/10.3997/2214-4609.201600379

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., …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.