TY - CONF
T1 - Turbulent pipe flow through a 90° bend
AU - Hellström, Leo H.O.
AU - Zlatinov, Metodi B.
AU - Smits, Alexander J.
AU - Cao, Guongjun
N1 - Funding Information:
We are grateful for the financial support received under AFOSR Grant FA9550-09-1-0569 (Program Manager John Schmisseur) and ONR Grant N00014-09-1-0263 (Program
Funding Information:
We are grateful for the financial support received under AFOSR Grant FA9550-09-1-0569 (Program Manager John Schmisseur) and ONR Grant N00014-09-1-0263 (Program Manager Ron Joslin).
Publisher Copyright:
© 2011 International Symposium on Turbulence and Shear Flow Phenomena TSFP. All rights reserved.
PY - 2011
Y1 - 2011
N2 - Stereoscopic PIV is used to investigate the structure of fully developed turbulent pipe-flow through a 90° bend. The results show that Dean motions downstream of the bend are very weak in the mean, and time resolved stereoscopic PIV demonstrates that the Dean motions co-exist with large scale swirling motions that switch sign and do not contribute to the mean. Snapshot POD analysis of the flow field reveals that the structures found upstream of the bend persist after the bend and survive the strong secondary motions induced by the pipe curvature. In particular, the Very Large Scale Motions (VLSM) are no longer the most energetic mode in the flow, but they are still the most energetic structure in terms of the streamwise fluctuations.
AB - Stereoscopic PIV is used to investigate the structure of fully developed turbulent pipe-flow through a 90° bend. The results show that Dean motions downstream of the bend are very weak in the mean, and time resolved stereoscopic PIV demonstrates that the Dean motions co-exist with large scale swirling motions that switch sign and do not contribute to the mean. Snapshot POD analysis of the flow field reveals that the structures found upstream of the bend persist after the bend and survive the strong secondary motions induced by the pipe curvature. In particular, the Very Large Scale Motions (VLSM) are no longer the most energetic mode in the flow, but they are still the most energetic structure in terms of the streamwise fluctuations.
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M3 - Paper
AN - SCOPUS:84988721945
T2 - 7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011
Y2 - 28 July 2011 through 31 July 2011
ER -