Hydrodynamic Force on a Cylinder Oscillating at Low Frequency - Couverture souple

Couverture souple

ISBN 10 : 1289234663 ISBN 13 : 9781289234669

Editeur : Bibliogov, 2013

Synopsis

The hydrodynamic force on a cylinder oscillating transversely to its axis is a nonlinear function of the displacement amplitude x0. We report measurements and numerical calculations of the force at frequencies low enough that delta > R, where delta is the viscous penetration length and R is the cylinder radius. For small amplitudes, the numerically calculated Fourier transform of the force per unit length, F(sub small), agrees with Stokes' analytical calculation. For larger amplitudes, the force per unit length found by both calculation and measurement is F = F(sub small)C (x(sub 0)/delta, R/delta). The complex function C depends only weakly on R/delta, indicating that x0/delta is more appropriate as a scaling variable than the Keulegan-Carpenter number KC = pi*x(sub 0)/R. The measurements used a torsion oscillator driven at frequencies from 1 to 12 Hz while immersed in dense xenon. The oscillator comprised cylinders with an effective radius of R = 13.4 micron and oscillation amplitudes as large as x(sub 0)/delta = 4 (corresponding to KC as large as 71). The calculations used similar conditions except that the amplitudes were as large as x0/delta = 28.

Détails de l'édition

• Éditeur: Bibliogov
• Date d'édition: 2013
• Langue: anglais
• ISBN 10: 1289234663
• ISBN 13: 9781289234669
• Reliure: Broché
• Nombre de pages: 50
• Coordonnées du fabricant: non disponible
• Personne responsable: non disponible