Experiments in Fluids 37 (2004) 468 DOI 10.1007/s00348-004-0841-z Quantitative studies of the wakes of freely flying birds in a low-turbulence wind tunnel ¨ ´ G. R. Spedding, A. Hedenstrom, M. Rosen or Exp Fluids (2003) 34:291–303 Z h=2 0 2 In Spedding et al. (2003), the drag calculated from the D ¼ q U uðzÞ u ðzÞ dz ð3Þ x-momentum equation in Eq. (10) is given in an incorrect h=2 intermediate form between two correct alternatives. The The calculations in the paper are correct, and do not incorrect expression for the drag per unit span, D’,was reﬂect the typographical error. written h=2 Reference 0 2 2 D ¼ qU uðzÞ u ðzÞ dz ð1Þ Spedding GR, Hedenstro ¨ m A, Rose ´n M (2003) Quantitative studies of h=2 the wakes of freely ﬂying birds in a low-turbulence wind tunnel. Exp Fluids 34:291–303 for integrating through a wake proﬁle, u(z) over height h. The correct versions are h=2 uðzÞ uðzÞ 0 2 D ¼ qU dz ð2Þ U U 0 0 h=2 Received: 1 January 2004 Published online: 7 July 2004 Springer-Verlag 2004 The online version of the original article can be found at http:// dx.doi.org/10.1007/s00348-002-0559-8 G. R. Spedding (&) Department of Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, CA 90089–1191, USA E-mail: firstname.lastname@example.org ¨ ´ A. Hedenstrom, M. Rosen Department of Animal Ecology, Lund University, Ecology Building, SE-223 62 Lund, Sweden
Experiments in Fluids – Springer Journals
Published: Jul 7, 2004
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