HOPF-BIFURCATION IN WAKES BEHIND A ROTATING AND TRANSLATING CIRCULAR-CYLINDER - COMMENTS

Low-order Galerkin computational results [Phys. Fluids 8, 1972 (1996)] predict a decrease of vortex shedding frequency f with increasing cyl inder rotation angular velocity omega, in conflict with much earlier e xperimental results [M.S. thesis, University of California, San Diego, 1968; AIAA J. 7, 1817 (1969)] for which f increases with increasing o mega. A possible flaw in the computations is noted, and a correlation of experimental and computational results is presented. (C) 1997 Ameri can Institute of Physics.