Numerical Investigation of a Jet and Vortex Actuator (JaVA)

  • Muhammad Aqeel Rashad
  • Ulrich Rist
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 112)


In the present study an active flow control actuator is studied numerically using the CFD package Fluent®. A two-dimensional setup is chosen which corresponds to a cut through a real configuration that was studied experimentally by Lachowicz et al. [5] and called ”Jet and Vortex Actuator” (JaVA) because of its ability to produce such completely different flow regimes when its actuation frequency and amplitude are changed. Three cases are selected for validation of the simulations. A vortex mode, a verticaljet and a wall-jet mode. Our simulations yield the unsteady flow field, whereas only time-averaged data are available from literature. Thus, our simulations provide extra details of the flows through the gaps intended for a better understanding of the actuator flow. Qualitative and quantitative comparisons of the time-averaged data with the experiments are very encouraging. Especially, the different flow regimes appear for the same parameters as in the experiments.


Strouhal Number Stokes Number Control Actuator Actuation Frequency Vortex Mode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Fluent Inc.: Fluent 6.2 User’s Guide, Fluent Inc., Centerra Resource Park, 10 Cavendish Court, Lebanon, NH 03766 (January 2005)Google Scholar
  2. 2.
    Jacobson, S.C., Reynolds, W.C.: Active control of streamwise vortices and streaks in boundary layers. J. Fluid Mech. 360, 179–994 (1998)zbMATHCrossRefGoogle Scholar
  3. 3.
    Joslin, R.D., Lachowicz, J.T., Yao, C.: DNS of flow induced by a multi-flow actuator. In: ASME FEDSM98-5302, ASME Fluid Engineering Meeting (1998)Google Scholar
  4. 4.
    Koumoutsakos, P.: Simulations of vortex generators. Center for Turbulence Research, Annual Research Briefs, pp. 233–240 (1995)Google Scholar
  5. 5.
    Lachowicz, J.T., Yao, C., Wlezien, R.W.: Flow field characterization of a jet and vortex actuator. Exp. Fluids 27, 12–20 (1999)CrossRefGoogle Scholar
  6. 6.
    Saddoughi, S.G., Koumoutsakos, P., Bradshaw, P., Mansour, N.N.: Investigation of ‘On Demand’ vortex generators. Center for Turbulence Research Manuscript No. 171. Stanford University (1998)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Muhammad Aqeel Rashad
    • 1
  • Ulrich Rist
    • 1
  1. 1.Universität Stuttgart, I.A.G.StuttgartGermany

Personalised recommendations