All Outputs (15)

Unlocking the Dual Helical Ribbon for rotational viscosity measurements of highly heterogeneous fluids (2024)
Journal Article
Giancontieri, G., Hargreaves, D., Partal, P., & Lo Presti, D. (in press). Unlocking the Dual Helical Ribbon for rotational viscosity measurements of highly heterogeneous fluids. Materials and Design, Article 112920. https://doi.org/10.1016/j.matdes.2024.112920

Road bituminous binders are becoming more complex since, to enhance properties and/or engineer circular economy, the conventional binder is enriched with modifiers of different nature giving birth to a final-product recognisable as highly heterogeneo... Read More about Unlocking the Dual Helical Ribbon for rotational viscosity measurements of highly heterogeneous fluids.

The pairwise interaction of coalescing air bubbles in water (2023)
Journal Article
Al-Behadili, M. A., Hargreaves, D. M., & Hewakandamby, B. N. (2023). The pairwise interaction of coalescing air bubbles in water. International Journal of Multiphase Flow, 169, Article 104602. https://doi.org/10.1016/j.ijmultiphaseflow.2023.104602

There is a relative scarcity of experimental data relating to the interaction of a pair of millimetre-scale air bubbles rising having an offset configuration through stagnant water. To add to this dataset was the motivation behind this work. A series... Read More about The pairwise interaction of coalescing air bubbles in water.

2D Mesoscale cracking simulation of partially saturated asphalt based on moisture diffusion and a cohesive zone model (2023)
Journal Article
Li, L., Wu, J., Thom, N., Hargreaves, D., Airey, G., Zhu, J., …Zhang, Z. (2023). 2D Mesoscale cracking simulation of partially saturated asphalt based on moisture diffusion and a cohesive zone model. International Journal of Pavement Engineering, 24(1), Article 2242557. https://doi.org/10.1080/10298436.2023.2242557

The primary objective of this paper was to develop a combined model that incorporates moisture diffusion and a cohesive zone model, addressing anisotropic and loading-rate dependent cracking within partially saturated asphalt. Utilising X-ray CT scan... Read More about 2D Mesoscale cracking simulation of partially saturated asphalt based on moisture diffusion and a cohesive zone model.

Analysis and Prediction of Pothole Formation Rate Using Spatial Density Measurements and Pavement Condition Indicators (2023)
Journal Article
Abed, A., Rahman, M., Thom, N., Hargreaves, D., Li, L., & Airey, G. (2023). Analysis and Prediction of Pothole Formation Rate Using Spatial Density Measurements and Pavement Condition Indicators. Transportation Research Record, 2677(11), 651-664. https://doi.org/10.1177/03611981231166684

Potholes represent one of the dangerous distress types on roads. They form as a result of various factors, including water ingress, freeze–thaw, and pavement condition deterioration. In the UK, 1.7 million potholes were repaired in 2021; this critica... Read More about Analysis and Prediction of Pothole Formation Rate Using Spatial Density Measurements and Pavement Condition Indicators.

Modelling of Droplet Capture in an Open-Cell Metal Foam at the Pore and Macroscopic Scales (2023)
Journal Article
de Carvalho, T. P., Hargreaves, D. M., Morvan, H. P., & Klingsporn, M. (2023). Modelling of Droplet Capture in an Open-Cell Metal Foam at the Pore and Macroscopic Scales. Transport in Porous Media, 148, 1-25. https://doi.org/10.1007/s11242-023-01918-4

Open-cell metal foams are often used in applications where particulate and/or droplet capture is important. Here a Computational Fluid Dynamics (CFD) modelling approach is described which models the metal foam at both the pore-scale and the macroscop... Read More about Modelling of Droplet Capture in an Open-Cell Metal Foam at the Pore and Macroscopic Scales.

Wind tunnel measurements of the aerodynamic characteristics of a 3:2 rectangular cylinder including non-Gaussian and non-stationary features (2021)
Journal Article
Nguyen, C. H., Nguyen, D. T., Owen, J. S., & Hargreaves, D. M. (2022). Wind tunnel measurements of the aerodynamic characteristics of a 3:2 rectangular cylinder including non-Gaussian and non-stationary features. Journal of Wind Engineering and Industrial Aerodynamics, 220, Article 104826. https://doi.org/10.1016/j.jweia.2021.104826

This paper presents a wind tunnel investigation of the aerodynamic characteristics (force and pressure coefficients) of a static 3:2 rectangular cylinder in smooth flow for angles of attack between −4° and 90° at various values of Reynolds number. In... Read More about Wind tunnel measurements of the aerodynamic characteristics of a 3:2 rectangular cylinder including non-Gaussian and non-stationary features.

Typhoon track simulations in the North West Pacific: Informing a new wind map for Vietnam (2020)
Journal Article
Owen, J. S., Neves, L. C., Hargreaves, D. M., Franke, J., & Nguyen, C. H. (2021). Typhoon track simulations in the North West Pacific: Informing a new wind map for Vietnam. Journal of Wind Engineering and Industrial Aerodynamics, 208, Article 104441. https://doi.org/10.1016/j.jweia.2020.104441

This paper addresses the need to revise the current Vietnamese design wind map by proposing a new typhoon wind map for the country, based on Monte Carlo simulations of typhoon tracks in the North West Pacific basin. Using historical typhoon data from... Read More about Typhoon track simulations in the North West Pacific: Informing a new wind map for Vietnam.

Are we correctly measuring the rotational viscosity of heterogeneous bituminous binders? (2020)
Journal Article
Giancontieri, G., Hargreaves, D., & Lo Presti, D. (2020). Are we correctly measuring the rotational viscosity of heterogeneous bituminous binders?. Road Materials and Pavement Design, 21(Sup 1), S37-S56. https://doi.org/10.1080/14680629.2020.1724559

Modified bituminous binders allow asphalt technologists to design asphalt mixtures with superior performance. However, several recent studies highlighted that due to the complexity of these material, their characterisation can be challenging since co... Read More about Are we correctly measuring the rotational viscosity of heterogeneous bituminous binders?.

Vortex-induced vibration of a 5:1 rectangular cylinder: A comparison of wind tunnel sectional model tests and computational simulations (2018)
Journal Article
Nguyen, D. T., Hargreaves, D. M., & Owen, J. S. (2018). Vortex-induced vibration of a 5:1 rectangular cylinder: A comparison of wind tunnel sectional model tests and computational simulations. Journal of Wind Engineering and Industrial Aerodynamics, 175, https://doi.org/10.1016/j.jweia.2018.01.029

Considered to be representative of a generic bridge deck geometry and characterised by a highly unsteady flow field, the 5:1 rectangular cylinder has been the main case study in a number of studies including the “Benchmark on the Aerodynamics of a R... Read More about Vortex-induced vibration of a 5:1 rectangular cylinder: A comparison of wind tunnel sectional model tests and computational simulations.

Numerical modelling of the rise of Taylor bubbles through a change in pipe diameter (2017)
Journal Article
Ambrose, S., Lowndes, I. S., Hargreaves, D., & Azzopardi, B. (2017). Numerical modelling of the rise of Taylor bubbles through a change in pipe diameter. Computers and Fluids, 148, https://doi.org/10.1016/j.compfluid.2017.01.023

The rise of Taylor bubbles through expansions in vertical pipes is modelled using Computational Fluid Dynamics. The predictions from the models are compared against existing experimental work and show good agreement, both quantitatively and qualitati... Read More about Numerical modelling of the rise of Taylor bubbles through a change in pipe diameter.

Improving the rheometry of rubberized bitumen: experimental and computation fluid dynamics studies (2017)
Journal Article
Lo Presti, D., Giancontieri, G., & Hargreaves, D. M. (2017). Improving the rheometry of rubberized bitumen: experimental and computation fluid dynamics studies. Construction and Building Materials, 136, 286-297. https://doi.org/10.1016/j.conbuildmat.2016.12.200

© 2017 Multi-phase materials are common in several fields of engineering and rheological measurements are intensively adopted for their development and quality control. Unfortunately, due to the complexity of these materials, accurate measurements ca... Read More about Improving the rheometry of rubberized bitumen: experimental and computation fluid dynamics studies.

Numerical modeling of oscillating Taylor bubbles (2016)
Journal Article
Ambrose, S., Hargreaves, D. M., & Lowndes, I. (2016). Numerical modeling of oscillating Taylor bubbles. Engineering Applications of Computational Fluid Mechanics, 10(1), 578-598. https://doi.org/10.1080/19942060.2016.1224737

© 2016 The Author(s). In this study, computational fluid dynamics (CFD) modeling is used to simulate Taylor bubbles rising in vertical pipes. Experiments indicate that in large diameter (0.29 m) pipes for an air-water system, the bubbles can rise in... Read More about Numerical modeling of oscillating Taylor bubbles.

On the applicability of 2D URANS and SST k-? turbulence model to the fluid-structure interaction of rectangular cylinders (2015)
Journal Article
Nieto, F., Hargreaves, D., Owen, J. S., & Hernández, S. (in press). On the applicability of 2D URANS and SST k-ω turbulence model to the fluid-structure interaction of rectangular cylinders. Engineering Applications of Computational Fluid Mechanics, 9(1), https://doi.org/10.1080/19942060.2015.1004817

In this work the practical applicability of a 2D URANS approach adopting a block structured mesh and Menter's SST k-? turbulence model in fluid-structure interaction (FSI) problems is studied using as a test case a ratio B/H = 4 rectangular cylinder.... Read More about On the applicability of 2D URANS and SST k-? turbulence model to the fluid-structure interaction of rectangular cylinders.

Bridge deck flutter derivatives: efficient numerical evaluation exploiting their interdependence (2014)
Journal Article
Nieto, F., Owen, J., Hargreaves, D., & Hernández, S. (2015). Bridge deck flutter derivatives: efficient numerical evaluation exploiting their interdependence. Journal of Wind Engineering and Industrial Aerodynamics, 136, https://doi.org/10.1016/j.jweia.2014.11.006

Increasing the efficiency in the process to numerically compute the flutter derivatives of bridge deck sections is desirable to advance the application of CFD based aerodynamic design in industrial projects. In this article, a 2D unsteady Reynolds-av... Read More about Bridge deck flutter derivatives: efficient numerical evaluation exploiting their interdependence.

The computational fluid dynamics modelling of the autorotation of square, flat plates (2014)
Journal Article
Hargreaves, D., Kakimpa, B., & Owen, J. S. (2014). The computational fluid dynamics modelling of the autorotation of square, flat plates. Journal of Fluids and Structures, 46, https://doi.org/10.1016/j.jfluidstructs.2013.12.006

This paper examines the use of a coupled Computational Fluid Dynamics (CFD) – Rigid Body Dynamics (RBD) model to study the fixed-axis autorotation of a square flat plate. The calibration of the model against existing wind tunnel data is described. Du... Read More about The computational fluid dynamics modelling of the autorotation of square, flat plates.