Contribution of Reynolds-stress structures to the secondary flow in turbulent ducts
Atzori M, Vinuesa R, Lozano-Durán A, Schlatter P (2019)
Publication Type: Conference contribution
Publication year: 2019
Publisher: International Symposium on Turbulence and Shear Flow Phenomena, TSFP
Conference Proceedings Title: 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019
Event location: Southampton, GBR
Abstract
The present work is aimed at evaluating the contribution to the secondary flow in duct flow with square and rectangular cross section from three-dimensional coherent structures, defined as intense Reynolds-stress events. The contribution to a certain mean quantity is defined as the ensemble average over the detected coherent structures, weighted with their own occupied volume fraction. Our analysis unveils that the contribution to the cross-stream components of the mean velocity is either very similar to the same contribution in channel flow, or almost negligible in respect to the contribution from the portion of the domain not occupied by coherent structures. These results suggest that the most intense events are not directly responsible for the secondary flow.
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APA:
Atzori, M., Vinuesa, R., Lozano-Durán, A., & Schlatter, P. (2019). Contribution of Reynolds-stress structures to the secondary flow in turbulent ducts. In 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019. Southampton, GBR: International Symposium on Turbulence and Shear Flow Phenomena, TSFP.
MLA:
Atzori, Marco, et al. "Contribution of Reynolds-stress structures to the secondary flow in turbulent ducts." Proceedings of the 11th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2019, Southampton, GBR International Symposium on Turbulence and Shear Flow Phenomena, TSFP, 2019.
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