Comment on "The motion of an arbitrarily rotating spherical projectile and its application to ball games"

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

In a recent paper (Robinson G and Robinson I 2013 Phys. Scr. 88 018101) the authors developed the differential equations which govern the motion of a spherical projectile rotating about an arbitrary axis in the presence of an arbitrary wind, assuming that both the drag force and the lift force are independent of the Reynolds number and proportional to the square of the projectile's velocity. In this paper, by dimensional analysis, the latter assumption is shown to be incorrect for forces dependent on the angular velocity of the projectile, e.g. the lift force.
OriginalsprogEngelsk
TidsskriftPhysica Scripta
Vol/bind89
Udgave nummer6
Antal sider3
ISSN0031-8949
DOI
StatusUdgivet - jun. 2014

Citer dette

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Comment on "The motion of an arbitrarily rotating spherical projectile and its application to ball games". / Jensen, Jens Højgaard.

I: Physica Scripta, Bind 89, Nr. 6, 06.2014.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Comment on "The motion of an arbitrarily rotating spherical projectile and its application to ball games"

AU - Jensen, Jens Højgaard

PY - 2014/6

Y1 - 2014/6

N2 - In a recent paper (Robinson G and Robinson I 2013 Phys. Scr. 88 018101) the authors developed the differential equations which govern the motion of a spherical projectile rotating about an arbitrary axis in the presence of an arbitrary wind, assuming that both the drag force and the lift force are independent of the Reynolds number and proportional to the square of the projectile's velocity. In this paper, by dimensional analysis, the latter assumption is shown to be incorrect for forces dependent on the angular velocity of the projectile, e.g. the lift force.

AB - In a recent paper (Robinson G and Robinson I 2013 Phys. Scr. 88 018101) the authors developed the differential equations which govern the motion of a spherical projectile rotating about an arbitrary axis in the presence of an arbitrary wind, assuming that both the drag force and the lift force are independent of the Reynolds number and proportional to the square of the projectile's velocity. In this paper, by dimensional analysis, the latter assumption is shown to be incorrect for forces dependent on the angular velocity of the projectile, e.g. the lift force.

U2 - 10.1088/0031-8949/89/6/067001

DO - 10.1088/0031-8949/89/6/067001

M3 - Journal article

VL - 89

JO - Physica Scripta

JF - Physica Scripta

SN - 0031-8949

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ER -