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Blockage Ratio and Reynolds Number Effects on the CFD Prediction of Flow over an Isolated Tire Model
Technical Paper
2021-01-0956
ISSN: 0148-7191, e-ISSN: 2688-3627
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SAE WCX Digital Summit
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English
Abstract
For flows around a tire rotating over a ground plane, the Reynolds number is probably the most important parameter influencing the transition mechanism leading to flow separation from the tire surface, as it determines the viscous response of the boundary layer in the vortex-wall interaction. The present work investigates the effects of Reynolds number on an isolated tire model using a commercial Computational Fluid Dynamics (CFD) code. It validates the baseline simulation for this purpose against the Particle Image Velocimetry (PIV) data from Stanford University got using a Toyota Formula 1 race car tire model. Time-resolved velocity fields and vortex structures from the PIV data are used to correlate local and global flow phenomena to identify unsteady boundary-layer separation and the subsequent flow structures. The study will highlight the pre to post critical flow regimes where the aero coefficients and vortex structure will be studied. This study will also include an analysis of the effects of Reynolds number on various aspects of the flow, such as the time-dependent wake structures, shear layer interactions, locations of flow separation, and pressure distributions. Also, wind tunnel blockage effects are studied.
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Meederira, P., Fadler, G., and Uddin, M., "Blockage Ratio and Reynolds Number Effects on the CFD Prediction of Flow over an Isolated Tire Model," SAE Technical Paper 2021-01-0956, 2021, https://doi.org/10.4271/2021-01-0956.Data Sets - Support Documents
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