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Time-Lapse Seafloor Surveys Reveal How Turbidity Currents and Internal Tides in Monterey Canyon Interact With the Seabed at Centimeter-Scale (2023)
Journal Article
Wolfson-Schwehr, M., Paull, C. K., Caress, D. W., Gwiazda, R., Nieminski, N. M., Talling, P. J., Carvajal, C., Simmons, S., & Troni, G. (2023). Time-Lapse Seafloor Surveys Reveal How Turbidity Currents and Internal Tides in Monterey Canyon Interact With the Seabed at Centimeter-Scale. Journal of Geophysical Research: Earth Surface, 128(4), Article e2022JF006705. https://doi.org/10.1029/2022JF006705

Here we show how ultra-high resolution seabed mapping using new technology can help to understand processes that sculpt submarine canyons. Time-lapse seafloor surveys were conducted in the axis of Monterey Canyon, ∼50km from the canyon head (∼1,840m... Read More about Time-Lapse Seafloor Surveys Reveal How Turbidity Currents and Internal Tides in Monterey Canyon Interact With the Seabed at Centimeter-Scale.

The unsteady overtopping of barriers by gravity currents and dam-break flows (2023)
Journal Article
Skevington, E. W., & Hogg, A. J. (2023). The unsteady overtopping of barriers by gravity currents and dam-break flows. Journal of Fluid Mechanics, 960, Article A27. https://doi.org/10.1017/jfm.2023.187

The collision of a gravitationally driven horizontal current with a barrier following release from a confining lock is investigated using a shallow water model of the motion, together with a sophisticated boundary condition capturing the local intera... Read More about The unsteady overtopping of barriers by gravity currents and dam-break flows.

Experimental investigation of a novel two-stage heat recovery heat pump system employing the vapor injection compressor at cold ambience and high water temperature conditions (2023)
Journal Article
Li, Y., Li, Z., Fan, Y., Zeng, C., Cui, Y., Zhao, X., Li, J., Chen, Y., Chen, J., & Shen, C. (2023). Experimental investigation of a novel two-stage heat recovery heat pump system employing the vapor injection compressor at cold ambience and high water temperature conditions. Renewable energy, 205, 678-694. https://doi.org/10.1016/j.renene.2023.01.101

Heat pumps (HPs) are energy-efficient space heating devices that are key to global carbon reduction and carbon neutrality. However, current commercial HPs have performance issues in cold climates where space heating is needed most, including low COP... Read More about Experimental investigation of a novel two-stage heat recovery heat pump system employing the vapor injection compressor at cold ambience and high water temperature conditions.

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.

Parametric and economic analysis of high-temperature cascade organic Rankine cycle with a biphenyl and diphenyl oxide mixture (2022)
Journal Article
Ren, X., Li, J., Pei, G., Li, P., & Gong, L. (2023). Parametric and economic analysis of high-temperature cascade organic Rankine cycle with a biphenyl and diphenyl oxide mixture. Energy Conversion and Management, 276, Article 116556. https://doi.org/10.1016/j.enconman.2022.116556

High-temperature organic Rankine cycle (ORC) systems have the potential to improve the heat-to-power conversion efficiency and expand the temperature range for heat recovery, heat battery and solar power generation. Restricted by the critical tempera... Read More about Parametric and economic analysis of high-temperature cascade organic Rankine cycle with a biphenyl and diphenyl oxide mixture.

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.

Rapid megaflood-triggered base-level rise on Mars (2022)
Journal Article
Ahmed, J., Peakall, J., Balme, M., & Parsons, D. R. (2023). Rapid megaflood-triggered base-level rise on Mars. Geology, 51(1), 28-32. https://doi.org/10.1130/G50277.1

The existence of ancient fluvial systems on Mars is widely accepted, but little is known about how quickly they formed, or what environmental conditions controlled their evolution. We analyzed a sequence of well-preserved inner-bank bar deposits with... Read More about Rapid megaflood-triggered base-level rise on Mars.