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
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Phillips, C.W.G.
767ff06f-b4a0-49a6-8e22-d0b2fd2df494
Hudson, D.A.
3814e08b-1993-4e78-b5a4-2598c40af8e7
Taunton, D.J.
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Turnock, S.R.
d6442f5c-d9af-4fdb-8406-7c79a92b26ce
September 2011
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, .
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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Published date: September 2011
Keywords:
swimming, passive drag, active drag
Organisations:
Fluid Structure Interactions Group
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Local EPrints ID: 198795
URI: http://eprints.soton.ac.uk/id/eprint/198795
PURE UUID: 858c90ab-5fe1-44f3-8da0-df7dcece19a1
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Date deposited: 06 Oct 2011 15:37
Last modified: 15 Mar 2024 03:36
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Contributors
Author:
A. Webb
Author:
C.W.G. Phillips
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