Repository logo
 
Publication

Hydrodynamic analysis of different thumb positions in swimming

2009Journal article Open access
Simple item page
dc.contributor.authorMarinho, Daniel
dc.contributor.authorRouboa, Abel I
dc.contributor.authorAlves, Francisco
dc.contributor.authorVilas Boas, J. Paulo
dc.contributor.authorMachado, Leandro
dc.contributor.authorReis, VM
dc.contributor.authorSilva, António
dc.date.accessioned2020-02-28T10:32:12Z
dc.date.available2020-02-28T10:32:12Z
dc.date.issued2009
dc.description.abstractThe aim of the present study was to analyze the hydrodynamic characteristics of a true model of a swimmer hand with the thumb in different positions using numerical simulation techniques. A three-dimensional domain was created to simulate the fluid flow around three models of a swimmer hand, with the thumb in different positions: thumb fully abducted, partially abducted, and adducted. These three hand models were obtained through computerized tomography scans of an Olympic swimmer hand. Steady-state computational fluid dynamics analyses were performed using the Fluent(®) code. The forces estimated in each of the three hand models were decomposed into drag and lift coefficients. Angles of attack of hand models of 0°, 45° and 90°, with a sweep back angle of 0° were used for the calculations. The results showed that the position with the thumb adducted presented slightly higher values of drag coefficient compared with thumb abducted positions. Moreover, the position with the thumb fully abducted allowed increasing the lift coefficient of the hand at angles of attack of 0° and 45°. These results suggested that, for hand models in which the lift force can play an important role, the abduction of the thumb may be better, whereas at higher angles of attack, in which the drag force is dominant, the adduction of the thumb may be preferable. Key pointsNumerical simulation techniques can provide answers to problems which have been unobtainable using experimental methods.The computer tomography scans allowed the creation of a complete and true digital anatomic model of a swimmer hand.The position with the thumb adducted presented slightly higher values of drag coefficient than the positions with the thumb abducted.The position with the thumb fully abducted allowed increasing the lift coefficient of the hand at angles of attack of 0 and 45 degrees.For hand positions in which the lift force can play an important role the abduction of the thumb may be better whereas at higher angles of attack, in which the drag force is dominant, the adduction of the thumb may be preferable for swimmers.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/9617
dc.language.isoengpt_PT
dc.subjectComputational fluid dynamicspt_PT
dc.subjectDragpt_PT
dc.subjectFingerpt_PT
dc.subjectHandpt_PT
dc.subjectLiftpt_PT
dc.subjectReverse engineeringpt_PT
dc.titleHydrodynamic analysis of different thumb positions in swimmingpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage66pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage58pt_PT
oaire.citation.titleJournal of Sports Science and Medicinept_PT
oaire.citation.volume8pt_PT
person.familyNameMarinho
person.familyNameRouboa
person.familyNameBessone Ferreira Alves
person.familyNameVilas-Boas
person.familyNameMachado
person.familyNameSilva
person.givenNameDaniel
person.givenNameAbel
person.givenNameFrancisco José
person.givenNameJ. Paulo
person.givenNameLeandro
person.givenNameAntónio
person.identifier497179
person.identifierR-000-92N
person.identifier.ciencia-id471B-F3CC-479A
person.identifier.ciencia-idA31F-03A9-5CD3
person.identifier.ciencia-idCC1C-23F1-2CBB
person.identifier.ciencia-id0D18-D46F-09A1
person.identifier.ciencia-id7E17-6B94-5441
person.identifier.ciencia-idBF1B-3A8D-1328
person.identifier.ciencia-id8C15-83CB-5566
person.identifier.orcid0000-0003-2351-3047
person.identifier.orcid0000-0003-2652-8789
person.identifier.orcid0000-0002-1317-155X
person.identifier.orcid0000-0002-4109-2939
person.identifier.orcid0000-0001-5332-5974
person.identifier.orcid0000-0002-4996-1414
person.identifier.orcid0000-0001-5790-5116
person.identifier.scopus-author-id15022568500
person.identifier.scopus-author-id6603461700
person.identifier.scopus-author-id26424846800
person.identifier.scopus-author-id7102866127
person.identifier.scopus-author-id13410238400
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication1b7a1cda-cf15-4686-bb08-1ac47b66b314
relation.isAuthorOfPublication1211756e-e062-4071-ba79-d81a97be62e7
relation.isAuthorOfPublication2e16896a-c404-4532-9bc5-9fd74a491128
relation.isAuthorOfPublication66d9e3f3-ab73-45ef-b401-571284df3553
relation.isAuthorOfPublication2ef6c423-d9ae-4e90-8c96-307ce18f596a
relation.isAuthorOfPublication6c9cc87e-b5f5-42c8-ba34-897982a211ba
relation.isAuthorOfPublicationf83dec25-3fd3-4490-843d-805a431ee258
relation.isAuthorOfPublication.latestForDiscovery1211756e-e062-4071-ba79-d81a97be62e7

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
109 - jssm-08-58.pdf
Size:
503.72 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

FCSH - DCD | Documentos por Auto-Depósito
ICI - CIDESD-UBI | Documentos por Auto-Depósito