Comparison of the Aerodynamic Performance of Four Racing Bicycle Wheels by Means of CFD Calculations

Pogni, Matteo; Petrone, Nicola; Antonello, Marco; Gobbato, Paolo

doi:10.1016/j.proeng.2015.07.218

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…Realizable k-epsilon turbulence model was proceed using a RANS model based on previous cycling studies [18], [21]. Moreover, the Realizable k-epsilon showed higher computation economy in comparison to Standard k-epsilon, RST and RNG k-epsilon models [17], [19], [31].…”

Section: Numerical Simulationsmentioning

confidence: 99%

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Aerodynamic analysis of human walking, running and sprinting by numerical simulations

Forte¹,

Sousa²,

Teixeira³

et al. 2022

Acta Bioeng Biomech

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Purpose The drag in walking, running, and sprinting locomotion can be assessed by analytical procedures and experimental techniques. However, assessing the drag variations by these three main locomotion’s (i.e., walking, running, and sprinting) were not found using computational fluid dynamics. (CFD). Thus, the aim of this study was two-fold: (1) to assess the aerodynamics of human walking, running, and sprinting by CFD technique; 2) compare such aerodynamic characteristics between walking and running. Methods Three 3D models were produced depicting the walking, running, and sprinting locomotion techniques, converted to computer aided design models and meshed. The drag varied with locomotion type. Results Walking had the lowest drag, followed-up by running and then sprinting. At the same velocities, the drag was larger in walking than in running and increased with velocity. Conclusions In conclusion, drag varied with locomotion type. Walking had the lowest drag, followed-up by running and then sprinting. At the same velocities, the drag was larger in walking than in running and increased with velocity.

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Section: Numerical Simulationsmentioning

confidence: 99%

“…The SIMPLE algorithm was used for pressure-velocity coupling [15]. The convection terms, pressure and viscosity were defined as second order and the least squares cell-based technique computed the gradients [15], [31]. The moment and pressure were computed as first and second orders, respectively.…”

Section: Numerical Simulationsmentioning

confidence: 99%

Aerodynamic analysis of human walking, running and sprinting by numerical simulations

Forte¹,

Sousa²,

Teixeira³

et al. 2022

Acta Bioeng Biomech

View full text Add to dashboard Cite

show abstract

“…Six commercial bicycle wheels of similar types to those studied by Tew and Sayers 13 were analysed by Godo et al 15 using numerical methods, where a range of yaw angles were tested using steady-state and transient methods; the accuracy of the numerical results was determined via qualitative analysis which produced similar trends to experimental data. In addition, numerical studies by Pogni et al 16 further confirmed the capabilities of steady Reynolds-averaged Navier–Stokes (RANS) calculations to correctly describe the aerodynamic characteristics of bicycle wheels. Additional experiments on wheel aerodynamics were conducted by Barry et al 17 on several wheel types, with a dynamic mannequin mounted on a bicycle to provide realistic flow-field effects.…”

Section: Introductionmentioning

confidence: 87%

Computational fluid dynamics analysis of hand-cycle aerodynamics with static wheels: Sensitivity analyses and impact of wheel selection

Mannion

Toparlar

Blocken

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part P:

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Aerodynamics research in cycling has underpinned innovative bicycle design, new refined riding positions and optimised rider apparel. There has been a rise in the level of aerodynamics research focused on cycling since the turn of the millennium, enabled by significant increases in computational power and the availability of software/hardware. However, cycling research has not yet fully embraced para-cycling, with limited studies conducted on the aerodynamic performance of hand-cyclists and other para-cyclists. Wind tunnel experiments and computational fluid dynamics simulations were conducted in this research for the analysis of hand-cycling aerodynamics, focused on competitive H1–H4 category hand-cyclists. A quarter-scale representative geometry of a hand-cyclist was used in high-speed wind tunnel experiments. The accuracy of the simulations performed with the three-dimensional Reynolds-averaged Navier–Stokes equations was found to be dependent on the turbulence model choice and near-wall grid resolution. Computational fluid dynamics simulations predicted the magnitude of the drag and lateral forces to an accuracy of 2.5% using the shear stress transport [Formula: see text] turbulence model. This study also presents the impact of wheel diameter and disc wheels on hand-cycling aerodynamics via computational fluid dynamics simulations, providing a deeper understanding of the aerodynamic characteristics unique to the hand-cycling discipline in the sport of competitive cycling. Drag reductions of up to 8.9% were found when utilising 20-inch diameter spoked wheels, opposed to the 26-inch wheels. Variations in wheel diameter between the front and rear wheels were found to have a significant impact on the CDA in part through altering the pitch angle of the hand-cycle.

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Effects of Wheel Depth on Individual Time Trial Performance Among Skilled Cyclists

Nabil,

Hasan,

Ismail

et al. 2023

Lecture Notes in Bioengineering

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Comparison of the Aerodynamic Performance of Four Racing Bicycle Wheels by Means of CFD Calculations

Cited by 5 publications

References 2 publications

Aerodynamic analysis of human walking, running and sprinting by numerical simulations

Aerodynamic analysis of human walking, running and sprinting by numerical simulations

Computational fluid dynamics analysis of hand-cycle aerodynamics with static wheels: Sensitivity analyses and impact of wheel selection

Effects of Wheel Depth on Individual Time Trial Performance Among Skilled Cyclists

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