Nonlinear Response of Planar Laminar Flow Over a Flat Plate Vibrating in Different Modes

[+] Author and Article Information
N. Kolluru Venkat

Spaulding Environmental Associates, Inc., Wakefield, RI 02879

Malcolm Spaulding

Department of Ocean Engineering, The University of Rhode Island, Kingston, RI 02881

J. Fluids Eng 114(4), 577-584 (Dec 01, 1992) (8 pages) doi:10.1115/1.2910070 History: Received April 01, 1992; Online May 23, 2008


A computer model developed by Venkat and Spaulding (1991a) for unsteady flows over vibrating bodies is used to investigate the nonlinear characteristics of external flow over a flat plate, a section of which is subjected to time varying motion of various mode shapes (n). The Reynolds number, Re is fixed at 1000. For the first case, the Strouhal number, St and the vibration amplitude ratio, H0 are fixed at 0.25 and 0.025, respectively while for the second case, St and H0 are increased to 1.0 and 0.1, respectively. Simulations are performed for modes varying in the range 1<n<4. For n=1, upstream and downstream pressure wave propagation is very high compared to higher modes. The transfer of energy from the input frequency to the first harmonic is pronounced for higher modes. A source-sink pair exists over the vibrating section for even modes. For high St and H0 the pressure spectral amplitude of higher harmonics far downstream is quite large for n=4 compared to n=2 thus indicating more nonlinear interaction between the vibrating body and the external flow for large even modes. The pressure coefficient on either side of the vibrating section is controlled by the gradient of vorticity for odd modes and by the convective acceleration terms for even modes.

Copyright © 1992 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In