Chih-Chung Hu et al 2004 Fluid Dyn. Res. 35 409 doi:10.1016/j.fluiddyn.2004.10.001
Chih-Chung Hu1,2, Jiun-Jih Miau2,4 and Jung-Hua Chou3
Show affiliationsCommunicated by Mitsuaki Funakoshi
Efforts are made to explore the hysteresis characteristics of vortex shedding in a pipe flow, whose velocity varies periodically in time. Results obtained show that during acceleration of the flow, the vortex strength tends to be stronger, whereas during deceleration of the flow, the situation is reversed. As reconstructed from the velocity signals measured at a point in the flow field, the shed vortex arrays appear to possess uneven vortex strengths in response to periodically-varying incoming flows. Furthermore, in the hysteresis range, the streamwise spacings between the vortices appear to be unequal.
47.27.nf Flows in pipes and nozzles
47.80.Cb Velocity measurements
Issue 6 (December 2004)
Received 21 April 2003, revised 13 February 2004, accepted for publication 5 October 2004
Chih-Chung Hu et al 2004 Fluid Dyn. Res. 35 409
Meijie Tang et al 2006 Modelling Simul. Mater. Sci. Eng. 14 1139
Romualdo Pastor-Satorras and Alessandro Vespignani 2000 J. Phys. A: Math. Gen. 33 L33
Masayuki Morisawa et al 2001 Meas. Sci. Technol. 12 877
A Gómez and J D Meiss 2004 Nonlinearity 17 975
Danny van Noort et al 2002 Smart Mater. Struct. 11 756
D T A Blair et al 1989 J. Phys. D: Appl. Phys. 22 755
Ntina Savvidou 2004 Class. Quantum Grav. 21 615
J P Dada et al 2006 Phys. Scr. 74 618
Robert J Berry 1983 Metrologia 19 37