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3. On the Forces experienced by Solids immersed in a Moving Liquid

Published online by Cambridge University Press:  15 September 2014

William Thomson
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Extract

Cyclic irrotational motion, [§ 60 (z)] once established through an aperture or apertures, in a movable solid immersed in a liquid, continues for ever after with circulation or circulations unchanged, [§60 (a)] however the solid be moved, or bent, and whatever influences experienced from other bodies. The solid, if rigid and left at rest, must clearly continue at rest relatively to the fluid surrounding it to an infinite distance, provided there be no other solid within an infinite distance from it. But if there be any other solid or solids at rest within any finite distance from the first, there will be mutual forces between them, which, if not balanced by proper application of force, will cause them to move.

Type
Proceedings 1869-70
Information
Proceedings of the Royal Society of Edinburgh , Volume 7 , 1872 , pp. 60 - 63
Copyright
Copyright © Royal Society of Edinburgh 1872

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References

page 60 note * The references §§ without farther title are to the author's paper on Vortex Motion, recently published in the Transactions (1869), which contains definitions of all the new terms used in the present article. Proofs of such of the propositions now enunciated as require proof are to be found in a continuation of that paper.

page 61 note * Or from Helmholtz's original integration of the hydrokinetic equations.

page 61 note † Real diamagnetic substances are, according to Faraday's very expressive language, relatively to lines of magnetic force, worse conductors than air.

The ideal substance of infinite diamagnetic inductive capacity is a substance which completely sheds off lines of magnetic force, or which is perfectly impervious to magnetic force.