All Outputs (58)

Monopile-induced turbulence and sediment redistribution form visible wakes in offshore wind farms (2024)
Journal Article
Bailey, L. P., Dorrell, R., Kostakis, I., McKee, D., Parsons, D. R., Rees, J., Strong, J. A., Simmons, S., & Forster, R. M. (2024). Monopile-induced turbulence and sediment redistribution form visible wakes in offshore wind farms. Frontiers in Earth Science, 12, Article 1383726. https://doi.org/10.3389/feart.2024.1383726

Offshore wind farms are becoming an increasingly common feature in the marine environment as a renewable energy source. There is a growing body of evidence on the effects of wind farms on the seabed and its organisms. However, an important and unders... Read More about Monopile-induced turbulence and sediment redistribution form visible wakes in offshore wind farms.

Circulation of hydraulically ponded turbidity currents and the filling of continental slope minibasins (2024)
Journal Article
Reece, J. K., Dorrell, R. M., & Straub, K. M. (2024). Circulation of hydraulically ponded turbidity currents and the filling of continental slope minibasins. Nature communications, 15(1), Article 2075. https://doi.org/10.1038/s41467-024-46120-2

Natural depressions on continental margins termed minibasins trap turbidity currents, a class of sediment-laden seafloor density driven flow. These currents are the primary downslope vectors for clastic sediment, particulate organic carbon, and micro... Read More about Circulation of hydraulically ponded turbidity currents and the filling of continental slope minibasins.

Benthic biology influences sedimentation in submarine channel bends: Coupling of biology, sedimentation and flow (2024)
Journal Article
Azpiroz-Zabala, M., Sumner, E. J., Cartigny, M. J., Peakall, J., Clare, M. A., Darby, S. E., …Johnson, J. (2024). Benthic biology influences sedimentation in submarine channel bends: Coupling of biology, sedimentation and flow. The Depositional Record, https://doi.org/10.1002/dep2.265

Submarine channels are key features for the transport of flow and nutrients into deep water. Previous studies of their morphology and channel evolution have treated these systems as abiotic, and therefore assume that physical processes are solely res... Read More about Benthic biology influences sedimentation in submarine channel bends: Coupling of biology, sedimentation and flow.

The Role of The Coriolis Force on Deep Marine Gravity Currents in Sinuous Channels (2024)
Thesis
Nilufan, X. (2023). The Role of The Coriolis Force on Deep Marine Gravity Currents in Sinuous Channels. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4564869

Gravity currents can be generated by density differences created by high suspended sediment concentrations in the form of turbidity currents, which can also transport significant volumes of near surface waters into the deep ocean. These flows are oft... Read More about The Role of The Coriolis Force on Deep Marine Gravity Currents in Sinuous Channels.

Dynamics of microplastics particles in rivers: experimental settling processes and numerical models of the transport and deposition (2023)
Thesis
Barrantes, L. I. A. (2023). Dynamics of microplastics particles in rivers: experimental settling processes and numerical models of the transport and deposition. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4367345

Microplastic pollution is an environmental problem facing rivers, oceans, and coastlines. Estimations suggest that around 1.15 to 12.7 million tonnes of plastic waste enter the ocean every year from the global riverine system. In the environment, org... Read More about Dynamics of microplastics particles in rivers: experimental settling processes and numerical models of the transport and deposition.

Streamwise Turbulence Modulation in Non-Uniform Open-Channel Clay Suspension Flows (2023)
Journal Article
de Vet, M. G., Fernández, R., Baas, J. H., McCaffrey, W. D., & Dorrell, R. M. (2023). Streamwise Turbulence Modulation in Non-Uniform Open-Channel Clay Suspension Flows. Journal of Geophysical Research: Earth Surface, 128(8), Article e2022JF006781. https://doi.org/10.1029/2022JF006781

Cohesive sediment particles are ubiquitous in environmental flows. The cohesive properties of clay promote the formation of clay flocs and gels and relatively small suspended clay concentrations can enhance or suppress turbulence in a flow. Furthermo... Read More about Streamwise Turbulence Modulation in Non-Uniform Open-Channel Clay Suspension Flows.

Inadequacy of fluvial energetics for describing gravity current autosuspension (2023)
Journal Article
Fukuda, S., de Vet, M. G., Skevington, E. W., Bastianon, E., Fernández, R., Wu, X., …Dorrell, R. M. (2023). Inadequacy of fluvial energetics for describing gravity current autosuspension. Nature communications, 14(1), Article 2288. https://doi.org/10.1038/s41467-023-37724-1

Gravity currents, such as sediment-laden turbidity currents, are ubiquitous natural flows that are driven by a density difference. Turbidity currents have provided vital motivation to advance understanding of this class of flows because their enigmat... Read More about Inadequacy of fluvial energetics for describing gravity current autosuspension.

On the role of transverse motion in pseudo-steady gravity currents (2023)
Journal Article
Marshall, C. R., Dorrell, R. M., Keevil, G. M., Peakall, J., & Tobias, S. M. (2023). On the role of transverse motion in pseudo-steady gravity currents. Experiments in Fluids, 64(3), Article 63. https://doi.org/10.1007/s00348-023-03599-7

Flow in the body of gravity currents is typically assumed to be statistically two-dimensional, and cross-stream flow is often neglected (Simpson 1997; Meiburg et al. 2015). Here, we assess the validity of such assumptions using Shake-the-Box particle... Read More about On the role of transverse motion in pseudo-steady gravity currents.

Multi-fidelity modelling of shark skin denticle flows: insights into drag generation mechanisms (2023)
Journal Article
Lloyd, C., Mittal, K., Dutta, S., Dorrell, R. M., Peakall, J., Keevil, G. M., & Burns, A. D. (2023). Multi-fidelity modelling of shark skin denticle flows: insights into drag generation mechanisms. Royal Society Open Science, 10(2), Article 220684. https://doi.org/10.1098/rsos.220684

We investigate the flow over smooth (non-ribletted) shark skin denticles in an open-channel flow using direct numerical simulation (DNS) and two Reynolds averaged Navier-Stokes (RANS) closures. Large peaks in pressure and viscous drag are observed at... Read More about Multi-fidelity modelling of shark skin denticle flows: insights into drag generation mechanisms.

Density stratification controls the bedform phase diagram of saline-gravity currents versus open-channel flows (2023)
Journal Article
Ohata, K., de Cala, I., Dorrell, R. M., Naruse, H., McLelland, S. J., Simmons, S. M., & McCaffrey, W. D. (in press). Density stratification controls the bedform phase diagram of saline-gravity currents versus open-channel flows. Sedimentology, https://doi.org/10.1111/sed.13075

Sedimentary bedforms such as ripples and dunes are generated both by river flows and sediment-laden gravity currents. Gravity current deposits are usually parameterized using existing bedform phase diagrams which are based on data from laboratory exp... Read More about Density stratification controls the bedform phase diagram of saline-gravity currents versus open-channel flows.

Effect of hydro-climate variation on biofilm dynamics and its impact in intertidal environments (2022)
Journal Article
Bastianon, E., Hope, J. A., Dorrell, R. M., & Parsons, D. R. (2022). Effect of hydro-climate variation on biofilm dynamics and its impact in intertidal environments. Earth surface dynamics European Geosciences Union, 10(6), 1115-1140. https://doi.org/10.5194/esurf-10-1115-2022

Shallow tidal environments are very productive ecosystems but are sensitive to environmental changes and sea level rise. Bio-morphodynamic control of these environments is therefore a crucial consideration; however, the effect of small-scale biologic... Read More about Effect of hydro-climate variation on biofilm dynamics and its impact in intertidal environments.

Turbulence modulation in non-uniform and unsteady clay suspension flows (2022)
Thesis
de Vet, M. (2022). Turbulence modulation in non-uniform and unsteady clay suspension flows. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4240676

Cohesive sediment is common within natural environments, such as rivers, estuaries, shallow seas and deep oceans. High-magnitude, low-frequency events, such as storms, floods, and post-wildfire erosion, which occur more often due to climate change, c... Read More about Turbulence modulation in non-uniform and unsteady clay suspension flows.

Mixing in density- and viscosity-stratified flows (2022)
Journal Article
Allen, P. A., Dorrell, R. M., Harlen, O. G., Thomas, R. E., & McCaffrey, W. D. (2022). Mixing in density- and viscosity-stratified flows. Physics of Fluids, 34(9), Article 096605. https://doi.org/10.1063/5.0108337

The lock-exchange problem is used extensively to study the flow dynamics of density-driven flows, such as gravity currents, and as a canonical problem to mixing in stratified flows. Opposite halves of a domain are filled with two fluids of different... Read More about Mixing in density- and viscosity-stratified flows.

Time‐Domain Implementation and Analyses of Multi‐Motion Modes of Floating Structures (2022)
Journal Article
Sheng, W., Tapoglou, E., Ma, X., Taylor, C. J., Dorrell, R., Parsons, D. R., & Aggidis, G. (2022). Time‐Domain Implementation and Analyses of Multi‐Motion Modes of Floating Structures. Journal of Marine Science and Engineering, 10(5), Article 662. https://doi.org/10.3390/jmse10050662

The study of wave‐structure interactions involving nonlinear forces would often make use of the popular hybrid frequency–time domain method. In the hybrid method, the frequency‐domain analysis could firstly provide the reliable and accurate dynamic p... Read More about Time‐Domain Implementation and Analyses of Multi‐Motion Modes of Floating Structures.

Graphics processing unit accelerated lattice Boltzmann method simulations of dilute gravity currents (2022)
Journal Article
Adekanye, D., Khan, A., Burns, A., McCaffrey, W., Geier, M., Schönherr, M., & Dorrell, R. (2022). Graphics processing unit accelerated lattice Boltzmann method simulations of dilute gravity currents. Physics of Fluids, 34(4), Article 046602. https://doi.org/10.1063/5.0082959

Lattice Boltzmann method models offer a novel framework for the simulation of high Reynolds number dilute gravity currents. The numerical algorithm is well suited to acceleration via implementation on massively parallel computer architectures. Here,... Read More about Graphics processing unit accelerated lattice Boltzmann method simulations of dilute gravity currents.

Anthropogenic Mixing in Seasonally Stratified Shelf Seas by Offshore Wind Farm Infrastructure (2022)
Journal Article
Dorrell, R. M., Lloyd, C. J., Lincoln, B. J., Rippeth, T. P., Taylor, J. R., Caulfield, C. C. P., …Simpson, J. H. (2022). Anthropogenic Mixing in Seasonally Stratified Shelf Seas by Offshore Wind Farm Infrastructure. Frontiers in Marine Science, 9, Article 830927. https://doi.org/10.3389/fmars.2022.830927

The offshore wind energy sector has rapidly expanded over the past two decades, providing a renewable energy solution for coastal nations. Sector development has been led in Europe, but is growing globally. Most developments to date have been in well... Read More about Anthropogenic Mixing in Seasonally Stratified Shelf Seas by Offshore Wind Farm Infrastructure.

Hydrodynamic studies of floating structures: Comparison of wave-structure interaction modelling (2022)
Journal Article
Sheng, W., Tapoglou, E., Ma, X., Taylor, C. J., Dorrell, R. M., Parsons, D. R., & Aggidis, G. (2022). Hydrodynamic studies of floating structures: Comparison of wave-structure interaction modelling. Ocean engineering, 249, Article 110878. https://doi.org/10.1016/j.oceaneng.2022.110878

Current panel methods for wave-structure interactions employ the potential flow theory, which provide fast, reliable and relatively accurate predictions for the marine structures, and now some open source packages, NEMOH and HAMS, are available. In t... Read More about Hydrodynamic studies of floating structures: Comparison of wave-structure interaction modelling.

The coupled dynamics of internal waves and hairpin vortices in stratified plane Poiseuille flow (2022)
Journal Article
Lloyd, C., Dorrell, R., & Caulfield, C. (2022). The coupled dynamics of internal waves and hairpin vortices in stratified plane Poiseuille flow. Journal of Fluid Mechanics, 934, Article A10. https://doi.org/10.1017/jfm.2021.1007

A simulation of stably stratified plane Poiseuille flow at a moderate Reynolds number (Formula Presented) and Richardson number (Formula Presented) is presented. For the first time, the dynamics in the channel core are shown to be described as a seri... Read More about The coupled dynamics of internal waves and hairpin vortices in stratified plane Poiseuille flow.

The effect of Schmidt number on gravity current flows: The formation of large-scale three-dimensional structures (2021)
Journal Article
Marshall, C. R., Dorrell, R. M., Dutta, S., Keevil, G. M., Peakall, J., & Tobias, S. M. (2021). The effect of Schmidt number on gravity current flows: The formation of large-scale three-dimensional structures. Physics of Fluids, 33(10), Article 106601. https://doi.org/10.1063/5.0064386

The Schmidt number, defined as the ratio of scalar to momentum diffusivity, varies by multiple orders of magnitude in real-world flows, with large differences in scalar diffusivity between temperature, solute, and sediment driven flows. This is espec... Read More about The effect of Schmidt number on gravity current flows: The formation of large-scale three-dimensional structures.

Equilibrium sediment transport by dilute turbidity currents: Comparison of competence-based and capacity-based models (2021)
Journal Article
Amy, L., & Dorrell, R. (in press). Equilibrium sediment transport by dilute turbidity currents: Comparison of competence-based and capacity-based models. Sedimentology, https://doi.org/10.1111/sed.12921

Equilibrium sediment transport is the condition of zero net entrainment and deposition by sediment-transporting flow (i.e. grade or regime). Here criteria for equilibrium sediment transport, or those used as proxies for equilibrium (for example, onse... Read More about Equilibrium sediment transport by dilute turbidity currents: Comparison of competence-based and capacity-based models.