All Outputs (21)

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?.

Reconciling Gaussian plume and Computational Fluid Dynamics models of particulate dispersion (2020)
Journal Article
Joseph, G. M. D., Hargreaves, D., & Lowndes, I. S. (2020). Reconciling Gaussian plume and Computational Fluid Dynamics models of particulate dispersion. Atmospheric Environment: X, 5, Article 100064. https://doi.org/10.1016/j.aeaoa.2020.100064

Computational Fluid Dynamics (CFD) is increasingly used to model particulate dispersion in situations where Gaussian Dispersion models are inappropriate or inaccurate. However, there is evidence which indicates that many CFD models under-predict l... Read More about Reconciling Gaussian plume and Computational Fluid Dynamics models of particulate dispersion.

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.

A computational study of particulate emissions from Old Moor Quarry, UK (2017)
Journal Article
Joseph, G., Lowndes, I., & Hargreaves, D. (2018). A computational study of particulate emissions from Old Moor Quarry, UK. Journal of Wind Engineering and Industrial Aerodynamics, 172, 68-84. https://doi.org/10.1016/j.jweia.2017.10.018

This paper presents an evaluation of a buoyancy-modified k--e dust dispersion model for predicting fugitive dust deposition from a surface quarry. The dust clouds are modelled as volumetric emissions and their dispersion simulated by coupling the flo... Read More about A computational study of particulate emissions from Old Moor Quarry, UK.

Pore-scale numerical investigation of pressure drop behaviour across open-cell metal foams (2017)
Journal Article
de Carvalho, T. P., Morvan, H., Hargreaves, D. M., Oun, H., & Kennedy, A. (2017). Pore-scale numerical investigation of pressure drop behaviour across open-cell metal foams. Transport in Porous Media, 117(2), 311-336. https://doi.org/10.1007/s11242-017-0835-y

The development and validation of a grid-based pore-scale numerical modelling methodology applied to five different commercial metal foam samples is described. The 3-D digital representation of the foam geometry was obtained by the use of X-ray micro... Read More about Pore-scale numerical investigation of pressure drop behaviour across open-cell metal foams.

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.

Computational studies on pressure distribution around a bending 5:1 rectangular cylinder (2016)
Conference Proceeding
Nguyen, D. T., Hargreaves, D., & Owen, J. (2016). Computational studies on pressure distribution around a bending 5:1 rectangular cylinder.

This paper describes the development and testing of a numerical model, based around the Large Eddy Simulation model, of a flexible 5:1 rectangular cylinder. We report on the vortex-induced vibration (VIV) of the bending cylinder, which is an analogue... Read More about Computational studies on pressure distribution around a bending 5:1 rectangular cylinder.

Wind tunnel studies of pressure distribution around a 5:1 rectangular cylinder (2016)
Conference Proceeding
Nguyen, D. T., Owen, J., & Hargreaves, D. (2016). Wind tunnel studies of pressure distribution around a 5:1 rectangular cylinder.

In this paper, a wind tunnel study is described focusing on analysing the pressure distribution and correlation around both static and dynamic 5:1 rectangular cylinders in smooth and turbulent flow. Results from the static tests highlighted the signi... Read More about Wind tunnel studies of pressure distribution around a 5:1 rectangular cylinder.

Computational studies of pressure distribution around a 5:1 rectangular section in turbulent flow (2015)
Conference Proceeding
Nguyen, D. T., Hargreaves, D., & Owen, J. (2015). Computational studies of pressure distribution around a 5:1 rectangular section in turbulent flow.

This paper presents a numerical method based on a LES approach to modelling the unsteady flow around and the vortex-induced vibration (VIV) of a 5:1 rectangular cylinder in the smooth and turbulent flow. A fluid-structure interaction algorithm was al... Read More about Computational studies of pressure distribution around a 5:1 rectangular section in turbulent flow.

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.