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Wind and Structures Volume 34, Number 1, January 2022 (Special Issue) pages 115-125 DOI: https://doi.org/10.12989/was.2022.34.1.115 |
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Impact of the lateral mean recirculation characteristics on the near-wake and bulk quantities of the BARC configuration |
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Gianmarco Lunghi, Elena Pasqualetto, Benedetto Rocchio, Alessandro Mariotti and Maria Vittoria Salvetti
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| Abstract | ||
| The high-Reynolds number flow around a rectangular cylinder, having streamwise to crossflow length ratio equal to 5 is analyzed in the present paper. The flow is characterized by shear-layer separation from the upstream edges. Vortical structures of different size form from the roll-up of these shear layers, move downstream and interact with the classical vortex shedding further downstream in the wake. The corresponding mean flow is characterized by a recirculation region along the lateral surface of the cylinder, ending by mean flow reattachment close to the trailing edge. The mean flow features on the cylinder side have been shown to be highly sensitive to set-up parameters both in numerical simulations and in experiments. The results of 21 Large Eddy Simulations (LES) are analyzed herein to highlight the impact of the lateral mean recirculation characteristics on the near-wake flow features and on some bulk quantities. The considered simulations have been carried out at Reynolds number Re=DU_ | ||
| Key Words | ||
| BARC benchmark; bulk quantities; Large-Eddy Simulations; lateral and near-wake flow features | ||
| Address | ||
| Gianmarco Lunghi:Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso, 8, 56122 Pisa, Italy Elena Pasqualetto: Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso, 8, 56122 Pisa, Italy Benedetto Rocchio: Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso, 8, 56122 Pisa, Italy Alessandro Mariotti: Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso, 8, 56122 Pisa, Italy aria Vittoria Salvetti: Dipartimento di Ingegneria Civile e Industriale, Università di Pisa, Via G. Caruso, 8, 56122 Pisa, Italy | ||