Boundary condition modifications of the Suzen-Huang plasma actuator model
Ibrahim, Imran H.
Date of Issue2012
School of Mechanical and Aerospace Engineering
The accuracy of the Suzen-Huang (S-H) model is improved by altering the boundary condition of the dielectric surface above the lower electrode. For the equation governing the electric field, we introduce a ‘dielectric shielding’ condition at the same region, which results in a spread of the electric field strength along the dielectric surface. For the equation governing the surface charge density, we introduce boundary conditions that modify the behavior of the charge density variable in the S-H model. The conditions represent a fitting procedure by adding the features of propagation and dissipation in a one-dimensional Fokker-Plank equation. The equation is initiated by a normal distribution function centered at the leading edge of the lower electrode. These modifications improved model results by about 50% when comparing the maximum induced velocity value with experimental results. Furthermore, charge density growth is propagating in a similar manner to that obtained by charge transport models.
International journal of flow control
© 2012 Multi Science Publishing. This paper was published in International journal of flow control and is made available as an electronic reprint (preprint) with permission of Multi Science Publishing. The paper can be found at the following official DOI: [http://dx.doi.org/10.1260/1756-8250.3.2-3.111]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.