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- W3007230901 abstract "A computational approach based on a k-ω delayed detached eddy simulation model for predicting aerodynamic loads on a smooth circular cylinder is verified against experiments. Comparisons with experiments are performed for flow over a rigidly-mounted (static) cylinder and for an elastically-mounted rigid cylinder oscillating in the transverse direction due to vortex-induced vibration (VIV). For the static cases, measurement data from the literature is used to validate the predictions for normally-incident flow. New experiments are conducted as a part of this study for yawed flow, where the cylinder axis is inclined with respect to the inflow velocity at the desired yaw angle, β=30∘. Good agreement is observed between the predictions and measurements for mean and rms surface pressure. Three yawed flow cases (β=15∘,30∘,&45∘) are simulated and the results are found to be independent of β (independence principle) when the flow speed normal to the cylinder axis is selected as the reference velocity scale. Dynamic (VIV) simulations for an elastically-mounted rigid cylinder are performed by coupling the flow solver with a solid dynamics solver where the cylinder motion is modeled as a mass–spring–damper system. The simulations accurately predict the displacement amplitude and unsteady loading over a wide range of reduced velocity, including the region where “lock-in” (synchronization) occurs. VIV simulations are performed at two yaw angles, β=0∘ and 45° and the independence principle is found to be valid over the range of reduced velocities tested with a slightly higher discrepancy when the vortex shedding frequency is close to the natural frequency of the system." @default.
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- W3007230901 date "2020-04-01" @default.
- W3007230901 modified "2023-09-24" @default.
- W3007230901 title "Verification of DES for flow over rigidly and elastically-mounted circular cylinders in normal and yawed flow" @default.
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- W3007230901 doi "https://doi.org/10.1016/j.jfluidstructs.2020.102895" @default.
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