Experiments in Fluids

, Volume 37, Issue 1, pp 22–28

Forcing a planar jet flow using MEMS

  • Thomas Peacock
  • Elizabeth Bradley
  • Jean Hertzberg
  • Yung-Cheng Lee
Original

DOI: 10.1007/s00348-004-0780-8

Cite this article as:
Peacock, T., Bradley, E., Hertzberg, J. et al. Exp Fluids (2004) 37: 22. doi:10.1007/s00348-004-0780-8

Abstract

We present the results of an experimental study in which a planar laminar jet of air was forced by an array of micro-electromechanical systems (MEMS) micro-actuators. In the absence of forcing, the velocity profile of the experimental jet matched the classic analytic solution. Driving actuators on either side of the jet in-phase or anti-phase, respectively, excited the symmetric or anti-symmetric mode of instability of the jet. Asymmetric forcing, using MEMS actuators on only one side of the jet, was also investigated.

List of symbols

x, y, z

Streamwise, cross-stream, and spanwise coordinates

u

Streamwise velocity

d

Exit slit width

U0

Centerline streamwise velocity

b

Jet half-width

v

Kinematic viscosity

Re

Reynolds number=U0b/v

M

Momentum flux

δu

Fluctuating velocity component in x direction

f

Forcing frequency of MEMS actuators

ω

Dimensionless frequency of velocity fluctuations=fb/U0

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Thomas Peacock
    • 1
  • Elizabeth Bradley
    • 2
  • Jean Hertzberg
    • 2
  • Yung-Cheng Lee
    • 2
  1. 1.Department of Mechanical EngineeringMITCambridgeUSA
  2. 2.University of ColoradoBoulderUSA