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Prediction of passive and active drag in swimming

Prediction of passive and active drag in swimming
Prediction of passive and active drag in swimming
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.
swimming, passive drag, active drag
133-140
Webb, A.
dfbf7223-9771-4465-9770-2e535e9f11d0
Banks, Joseph
3e915107-6d17-4097-8e77-99c40c8c053d
Phillips, C.W.G.
767ff06f-b4a0-49a6-8e22-d0b2fd2df494
Hudson, D.A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Taunton, D.J.
10bfbe83-c4c2-49c6-94c0-2de8098c648c
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
Webb, A.
dfbf7223-9771-4465-9770-2e535e9f11d0
Banks, Joseph
3e915107-6d17-4097-8e77-99c40c8c053d
Phillips, C.W.G.
767ff06f-b4a0-49a6-8e22-d0b2fd2df494
Hudson, D.A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Taunton, D.J.
10bfbe83-c4c2-49c6-94c0-2de8098c648c
Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce

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, 133-140.

Record type: Article

Abstract

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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More information

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

Identifiers

Local EPrints ID: 198795
URI: http://eprints.soton.ac.uk/id/eprint/198795
PURE UUID: 858c90ab-5fe1-44f3-8da0-df7dcece19a1
ORCID for Joseph Banks: ORCID iD orcid.org/0000-0002-3777-8962
ORCID for D.A. Hudson: ORCID iD orcid.org/0000-0002-2012-6255
ORCID for D.J. Taunton: ORCID iD orcid.org/0000-0002-6865-089X
ORCID for S.R. Turnock: ORCID iD orcid.org/0000-0001-6288-0400

Catalogue record

Date deposited: 06 Oct 2011 15:37
Last modified: 15 Mar 2024 03:36

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Contributors

Author: A. Webb
Author: Joseph Banks ORCID iD
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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