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Prediction of passive and active drag in swimming

Webb, A., Banks, Joseph, Phillips, C.W.G., Hudson, D.A., Taunton, D.J. and Turnock, S.R. (2011) Prediction of passive and active drag in swimming Procedia Engineering, 13, pp. 133-140.

Record type: Article


In order to understand the physical origin of passive resistance in swimming the resistance breakdown for
a swimmer is investigated. A combination of empirical methods and theoretical analysis is used to predict
passive resistance in the speed range 0 – 2 ms-1 and is shown to provide similar results to those from experimental testing. Typical magnitudes of wave, viscous pressure and skin friction resistance contribute 59%, 33% and 8% of total passive resistance respectively at free swim speed. A comparison is made between the widely used Velocity Perturbation Method and a Naval Architecture based approach in predicting active drag. For the swimmer investigated the two approaches predict active drag of 131.4 N and 133.9 N for a swimming speed of 1.53 ms-1. However, the results predicted from the Velocity Perturbation Method have a much higher uncertainty and the Naval Architecture based approach is suggested as a more robust method of predicting active drag.

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Published date: September 2011
Keywords: swimming, passive drag, active drag
Organisations: Fluid Structure Interactions Group


Local EPrints ID: 198795
PURE UUID: 858c90ab-5fe1-44f3-8da0-df7dcece19a1
ORCID for D.A. Hudson: ORCID iD
ORCID for D.J. Taunton: ORCID iD
ORCID for S.R. Turnock: ORCID iD

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Date deposited: 06 Oct 2011 15:37
Last modified: 18 Jul 2017 11:18

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Author: A. Webb
Author: Joseph Banks
Author: C.W.G. Phillips
Author: D.A. Hudson ORCID iD
Author: D.J. Taunton ORCID iD
Author: S.R. Turnock ORCID iD

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