All Outputs (58)

Flow induced vibration (FIV) of a pentagonal cylinder with high mass-damping ratio (2025)
Journal Article
Masoudi, E., Gan, L., Sims-Williams, D., & Marshall, A. (2025). Flow induced vibration (FIV) of a pentagonal cylinder with high mass-damping ratio. Journal of Fluids and Structures, 133, Article 104267. https://doi.org/10.1016/j.jfluidstructs.2025.104267

In this study, fluid structure interactions of a fixed and oscillating pentagonal cylinder are studied using experimental approaches. Specifically, flow induced vibration (FIV) of a pentagonal cylinder is studied with six different incidence angles (... Read More about Flow induced vibration (FIV) of a pentagonal cylinder with high mass-damping ratio.

Extracting Quantitative Streamline Information from Surface Flow Visualization Images in a Linear Cascade using Convolutional Neural Networks (2024)
Presentation / Conference Contribution
Liu, X., Ingram, G., Sims-Williams, D., & Breckon, T. P. (2024, September). Extracting Quantitative Streamline Information from Surface Flow Visualization Images in a Linear Cascade using Convolutional Neural Networks. Presented at GPPS Chania24, Chania

Surface flow visualization (SFV), specifically surface oil flow visualization, is an experimental technique that involves coating the surface with a mixture of oils and dyes before applying the flow to the subject. While investigating the surface flo... Read More about Extracting Quantitative Streamline Information from Surface Flow Visualization Images in a Linear Cascade using Convolutional Neural Networks.

Characterisation and Integration of Piezoelectric Trimorph Actuators for Blade Active Surface Control on a Scaled Wind Turbine (2024)
Journal Article
Fuentes Holden, J. P., Gan, L., Sims-Williams, D., Gilbert, J., Osborne, P., & Bastankhah, M. (2024). Characterisation and Integration of Piezoelectric Trimorph Actuators for Blade Active Surface Control on a Scaled Wind Turbine. Journal of Physics: Conference Series, 2767(9), Article 092094. https://doi.org/10.1088/1742-6596/2767/9/092094

The paper investigates the integration of piezoelectric bending actuators on trailing edge flaps (TEF). The characterisation of piezoelectric actuators is of great importance due to differences in performance resulting from sample variability, actuat... Read More about Characterisation and Integration of Piezoelectric Trimorph Actuators for Blade Active Surface Control on a Scaled Wind Turbine.

Beamforming Quantification of Acoustic Transmission Paths for Passenger Vehicles Using a Reciprocal Approach (2023)
Presentation / Conference Contribution
Oettle, N., Graham, S., Sims-Williams, D., Riegel, M., & Hebestreit, R. (2023, May). Beamforming Quantification of Acoustic Transmission Paths for Passenger Vehicles Using a Reciprocal Approach. Presented at Noise and Vibration Conference & Exhibition, Grand Rapids, Michigan, United States

This paper presents an experimental method for
measuring transmission paths from the exterior to the
interior of a passenger vehicle using a reciprocal
approach: A production vehicle was placed in a semi-anechoic
environment; artificial noise sou... Read More about Beamforming Quantification of Acoustic Transmission Paths for Passenger Vehicles Using a Reciprocal Approach.

Flow separation from polygonal cylinders in an incident flow (2023)
Journal Article
Masoudi, E., Sims-Williams, D., & Gan, L. (2023). Flow separation from polygonal cylinders in an incident flow. Physical Review Fluids, 8(1), Article 014701. https://doi.org/10.1103/physrevfluids.8.014701

In this paper, we carry out large eddy simulation of incident flow around polygonal cylinders of side number N = 5 − 8 at Reynolds number Re = 10 4 . In total, six incidence angles ( α ) are studied on each polygon between the face and the corner ori... Read More about Flow separation from polygonal cylinders in an incident flow.

Representative On-Road Aerodynamic Yaw Angle Distribution in China for Vehicle Development (2022)
Journal Article
Xiao, L., Wang, Q., Zhu, X., Bu, H., Huang, T., Yuan, X., …Sims-Williams, D. B. (2022). Representative On-Road Aerodynamic Yaw Angle Distribution in China for Vehicle Development. SAE International Journal of Passenger Vehicle Systems, 16(2), https://doi.org/10.4271/15-16-02-0008

Aerodynamic drag for road vehicles is most often assessed based on zero yaw conditions. The rise of electric vehicles in recent years put greater demand on how the vehicles perform in real-world conditions. Specifically, the aerodynamic drag performa... Read More about Representative On-Road Aerodynamic Yaw Angle Distribution in China for Vehicle Development.

Large Eddy Simulation of incident flows around polygonal cylinders (2021)
Journal Article
Masoudi, E., Gan, L., & Sims-Williams, D. (2021). Large Eddy Simulation of incident flows around polygonal cylinders. Physics of Fluids, 33(10), Article 105112. https://doi.org/10.1063/5.0063046

In this study, we carry out large eddy simulation (LES) of incident flow around polygonal cylinders of side number N = 5 − 8 at Reynolds number Re= 104 . In total, six incidence angles (α) are studied on each cylinder ranging from face to corner orie... Read More about Large Eddy Simulation of incident flows around polygonal cylinders.

Near wake flow features of polygonal cylinders in different incidence angles (2021)
Presentation / Conference Contribution
Masoudi, E., Gan, L., & Sims-Williams, D. (2021, September). Near wake flow features of polygonal cylinders in different incidence angles. Paper presented at UK Fluids Conference 2021, Online

In this study, large eddy simulation (LES) is used to simulate flow of incidence angle α around polygonal cylinders of side number N=5-8 at Reynolds number Re=10,000. Six incidence angles are studied on each cylinder, which covers the entire α spect... Read More about Near wake flow features of polygonal cylinders in different incidence angles.

Round-robin tests of porous disc models (2019)
Journal Article
Aubrun, S., Bastankhah, M., Cal, R., Conan, B., Hearst, R., Hoek, D., Hölling, M., Huang, M., Hur, C., Karlsen, B., Neunaber, I., Obligado, M., Peinke, J., Percin, M., Saetran, L., Schito, P., Schliffke, B., Sims-Williams, D., Uzol, O., Vinnes, M., & Zasso, A. (2019). Round-robin tests of porous disc models. Journal of Physics: Conference Series, 1256, https://doi.org/10.1088/1742-6596/1256/1/012004

Three Dimensional Beamforming for Improved Noise Source Localisation (2017)
Presentation / Conference Contribution
Sims-Williams, D., Kounenis, C., Dominy, R., & Oettle, N. Three Dimensional Beamforming for Improved Noise Source Localisation. Presented at 10th FKFS Conference Progress in Vehicle Aerodynamics and Thermal Management, Stuttgart, Germany

Automotive aeroacoustics: An overview (2017)
Journal Article
Oettle, N., & Sims-Williams, D. (2017). Automotive aeroacoustics: An overview. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 231(9), 1177-1189. https://doi.org/10.1177/0954407017695147

Vehicle aeroacoustic performance has a major influence on customer perception and also has importance for safety and comfort. Wind noise performance was once differentiated by the quality of sealing. Today, achieving competitive wind noise performanc... Read More about Automotive aeroacoustics: An overview.

Aerodynamic Analysis of Grand Prix Cars Operating in Wake Flows (2017)
Journal Article
Newbon, J., Sims-Williams, D., & Dominy, R. (2017). Aerodynamic Analysis of Grand Prix Cars Operating in Wake Flows. SAE International Journal of Passenger Cars - Mechanical Systems, 10(1), 318-329. https://doi.org/10.4271/2017-01-1546

The effect of the upstream wake of a Formula 1 car on a following vehicle has been investigated using experimental and computational methods. Multiple vehicle studies in conventional length wind tunnels pose challenges in achieving a realistic vehicl... Read More about Aerodynamic Analysis of Grand Prix Cars Operating in Wake Flows.

The Effects of Transient Flow Conditions on the Aerodynamics of an LCV Concept using CFD and Wind Tunnel Experiments (2016)
Presentation / Conference Contribution
Kremheller, A., Moore, M., Le Good, G., Sims-Williams, D., Newbon, J., & Lewis, R. (2016, September). The Effects of Transient Flow Conditions on the Aerodynamics of an LCV Concept using CFD and Wind Tunnel Experiments. Presented at International Conference on Vehicle Aerodynamics 2016, Coventry

Analysis of the Impacts of Formula 1 Car Wakes on the Aerodynamic Performance of a Following Vehicle (2016)
Presentation / Conference Contribution
Newbon, J., Sims-Williams, D., & Dominy, R. (2016, June). Analysis of the Impacts of Formula 1 Car Wakes on the Aerodynamic Performance of a Following Vehicle. Presented at Aerovehicles 2 : Second International Conference in Numerical and Experimental Aerodynamics of Road Vehicles and Trains., Göteborg, Sweden

This paper investigates the impact of the wake of a Formula 1 geometry on a following vehicle. For the case considered, the vehicle downforce is seen to be reacted by the pressure force on the ground plane, resulting in little net up-wash in the wake... Read More about Analysis of the Impacts of Formula 1 Car Wakes on the Aerodynamic Performance of a Following Vehicle.

Investigations of the Rear-End Flow Structures on a Sedan Car (2016)
Presentation / Conference Contribution
Kounenis, C., Bonitz, S., Ljungskog, E., Sims-Williams, D., Lofdahl, L., Broniewicz, A., Larsson, L., & Sebben, S. (2016, April). Investigations of the Rear-End Flow Structures on a Sedan Car. Presented at SAE 2016 World Congress and Exhibition, Detroit, Michigan

The aerodynamic drag, fuel consumption and hence CO2 emissions, of a road vehicle depend strongly on its flow structures and the pressure drag generated. The rear end flow which is an area of complex three-dimensional flow structures, contributes to... Read More about Investigations of the Rear-End Flow Structures on a Sedan Car.

The Effects of Unsteady Flow Conditions on Vehicle in Cabin and External Noise Generation (2015)
Presentation / Conference Contribution
Kounenis, C., Sims-Williams, D., Dominy, R., Berson, A., Oettle, N., & Freeman, C. (2015, April). The Effects of Unsteady Flow Conditions on Vehicle in Cabin and External Noise Generation. Presented at SAE 2015 World Congress & Exhibition, Detroit, Michigan

A vehicle driving on the road experiences unsteady flow conditions which are not generally reproduced in the development environment. This paper investigates the potential importance of this difference to aeroacoustics and hence to occupant perceptio... Read More about The Effects of Unsteady Flow Conditions on Vehicle in Cabin and External Noise Generation.

CFD Investigation of the Effect of the Salient Flow Features in the Wake of a Generic Open-Wheel Race Car (2015)
Journal Article
Newbon, J., Dominy, R., & Sims-Williams, D. (2015). CFD Investigation of the Effect of the Salient Flow Features in the Wake of a Generic Open-Wheel Race Car. SAE International Journal of Passenger Cars - Mechanical Systems, 8(1), 217-232. https://doi.org/10.4271/2015-01-1539

It is well known that in motorsport the wake from an upstream vehicle can be detrimental to the handling characteristics of a following vehicle, in particular in formulae with high levels of downforce. Previous investigations have been performed to c... Read More about CFD Investigation of the Effect of the Salient Flow Features in the Wake of a Generic Open-Wheel Race Car.

Interactions between Underbody Aerodynamics and Aeroacoustics (2014)
Presentation / Conference Contribution
Kounenis, C., Sims-Williams, D., Dominy, R., Berson, A., & Oettle, N. (2014, October). Interactions between Underbody Aerodynamics and Aeroacoustics. Presented at International Vehicle Aerodynamics Conference, Loughborough, UK

Research has shown that lack of ground effect simulation in the wind tunnel could result in different flow conditions from those experienced by the vehicle on the road, influencing aerodynamic noise inside the cabin. The focus of this work is the inf... Read More about Interactions between Underbody Aerodynamics and Aeroacoustics.

Investigation into the effect of the wake from a generic formula one car on a downstream vehicle (2014)
Presentation / Conference Contribution
Newbon, J., Sims-Williams, D., & Dominy, R. (2014, October). Investigation into the effect of the wake from a generic formula one car on a downstream vehicle. Presented at International Vehicle Aerodynamics Conference, Loughborough, UK

The aerodynamic performance of an open wheel race car is significantly affected when following another vehicle. This paper presents experimental and CFD results for a generic 25% scale Formula one car operating in the wake of another vehicle. Differe... Read More about Investigation into the effect of the wake from a generic formula one car on a downstream vehicle.

Assessing the Aeroacoustic Response of a Vehicle to Transient Flow Conditions from the Perspective of a Vehicle Occupant (2014)
Journal Article
Oettle, N., Sims-Williams, D., & Dominy, R. (2014). Assessing the Aeroacoustic Response of a Vehicle to Transient Flow Conditions from the Perspective of a Vehicle Occupant. SAE International Journal of Passenger Cars - Mechanical Systems, 7(2), 550-558. https://doi.org/10.4271/2014-01-0591

On-road, a vehicle experiences unsteady flow conditions due to turbulence in the natural wind, moving through the unsteady wakes of other road vehicles and travelling through the stationary wakes generated by roadside obstacles. Separated flow struct... Read More about Assessing the Aeroacoustic Response of a Vehicle to Transient Flow Conditions from the Perspective of a Vehicle Occupant.