A Computational Study of Idealized Bluff Bodies, Wheels, and Vortex Structures in Ground Effect

Desai, Sachin S.; Lo, Chi-Man Betty; George, A. R.

doi:10.4271/2008-01-0327

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…The convergence criterion is dependent on the residuals of the turbulence model as well as aerodynamic coefficients (Strachan 2006). The residual of the turbulence model is one of the determinants of the numerical simulation error (Desai et al 2008). In this paper, the convergence criteria of the solution were set lower than 10 -4 .…”

Section: Convergence Criteria and Validationmentioning

confidence: 99%

Numerical Simulation of the Flow Field around Generic Formula One

Dang

Chen

2016

JAFM

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The steady Reynolds-Averaged Navier-Stokes (RANS) method with the Realizable   k turbulence model was used to analyze the flow field around a race car (generic Formula One). This study was conducted using the ANSYS software package. The numerical simulations were conducted at a Reynolds number based on the race car model (14.9×106). The time-averaged velocity field, flow topology, velocity magnitude, static pressure magnitude and vortex regions of the flow fields are presented in this paper. The measurements were performed on the vertical and cross-sectional planes. The results are presented graphically, showing the main characteristics of the flow field around the whole race car, whereas most previous studies only mention the flow field around individual components of race cars. The Realizable k   turbulence model results showed consistency with the valuable validation data, which helps to elucidate the flow field around a model generic Formula one race car.

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Section: Convergence Criteria and Validationmentioning

confidence: 99%

Numerical Simulation of the Flow Field around Generic Formula One

Dang

Chen

2016

JAFM

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“…The convergence criterion is dependent on the residuals of the turbulence model as well as aerodynamic coefficients (Strachan, 2006). The residual of the turbulence model is one of the determinants of the numerical simulation error (Desai et al, 2008). In this paper, the convergence criteria of the solution were set to lower than 10 −4 .…”

Section: Convergence Criteria and Validationmentioning

confidence: 99%

Numerical simulation of flow field around the race car in case

Dang

Chen

2015

International Journal of Numerical Methods for Heat &Amp; Fluid Flow

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Purpose – The purpose of this paper is to gain a better understanding of the flow field structure around the race car in two cases: stationary wheel and rotating wheel. In addition, this paper also illustrates and clarifies the influence of wheel rotation on the aerodynamic characteristics around the race car. Design/methodology/approach – The author uses steady Reynolds-Averaged Navier-Stokes (RANS) equations with the Realizable k-ε model to study model open-wheel race car. Two cases are considered, a rotating wheel and stationary wheel. Findings – The results obtained from the study are presented graphically, pressure, velocity distribution, the flow field structure, lift coefficient (Cl) and drag coefficient (Cd) for two cases and the significant influence of rotating case on flow field structure around wheel and aerodynamic characteristics of race car. The decreases in Cd and Cl values in the rotating case for the race car are 16.83 and 13.25 per cent, respectively, when compared to the stationary case. Originality/value – Understanding the flow field structures and aerodynamic characteristics around the race car in two cases by the steady RANS equations with the Realizable k-ε turbulence model.

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“…1 Hence, drag force is an essential design parameter due to its direct influence in car efficiency and fuel consumption. Moreover, vortex interactions with the rest of the vehicle are crucial, particularly for open-wheeled racing cars as studied by Desai et al 2 and Diasions et al 3 Furthermore, recent advancements from regulators, within the worldwide harmonised light duty test cycles (WLTC) initiative, 4 have highlighted the importance of realistic condition, for example, deformed tyres, for the design and testing of automotive vehicles. 5 Over the last decades, several controlled experiments were performed on automotive wheels.…”

Section: Introductionmentioning

confidence: 99%

Computational modelling of a solid and deformed automotive rotating wheel in contact with the ground

Cánovas

Antoniadis

2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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An advanced computational framework is proposed for the load and force estimations of isolated rotating wheel-tyre systems. The framework is constituted by a computational structured dynamics solver and a computational fluid dynamics solver that effectively simulated the flow around the wheel including tyre deformation. Two finite element analysis models of the tyre are built, where the multilayer hyperelastic approach provides a more representative response compared with the linear elasticity model. The flow around the wheel is captured through the overset grid method where the zero-gap approach enables desirable computational performance near the contact patch area. Computational solutions are compared with experimental data and other computational works demonstrating good agreement on the non-deformed tyre model in terms of aerodynamic forces. A grid sensitivity analysis is performed to quantify the level of discretisation uncertainty as well as a comparison with unsteady and steady state solutions. The work demonstrates that current computer-aided engineering software are able to tackle more realistic and accurate simulations of wheel rim tyre systems, opening the field to future research and development in rotating mechanical systems.

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A Computational Study of Idealized Bluff Bodies, Wheels, and Vortex Structures in Ground Effect

Cited by 9 publications

References 15 publications

Numerical Simulation of the Flow Field around Generic Formula One

Numerical Simulation of the Flow Field around Generic Formula One

Numerical simulation of flow field around the race car in case

Computational modelling of a solid and deformed automotive rotating wheel in contact with the ground

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