Effects of the scalar parameters in the Suzen-Huang model on plasma actuator characteristics

• Published in: International journal of numerical methods for heat & fluid flow 2013-01, Vol.23 (6), p.1076-1103
• Main Authors: Halimi Bin Ibrahim, Imran, Skote, Martin
• Format: Article
• Language: English
• Subjects: Actuators; Charge density; Charged particles; Debye length; Design; Electric fields; Electrodes; Experiments; Flow control; Horizontal; Mathematical models; Modelling; Navier-Stokes equations; Plasma; Scalars; Studies
• ISSN: 0961-5539; 1758-6585
• DOI: 10.1108/HFF-05-2011-0108

Purpose - For the past decade, plasma actuators have been identified as a subset in the realm of active flow control devices. As research into plasma actuators continues to mature, computational modelling is needed to complement the investigation of the actuators. This paper seeks to address these issues.Design methodology approach - In this study, the Suzen-Huang model is chosen because of its ability to simulate both the charge density and Lorentz body force. Its advantages and limitations have been identified with a parametric study of two constants used in the modelling: the Debye length (λD) and the maximum charge density value (ρc* ). By varying the two scalars, the effects of charge density, body force and induced velocity are examined.Findings - The results show that the non-dimensionalised body force (Fb*) is nonlinearly dependent on Debye length. However, a linear variation of Fb* is observed with increasing values of maximum charge density. The optimized form of the Suzen-Huang model shows better agreement in the horizontal velocity profile but still points to inaccuracy when compared to vertical velocity profile.Originality value - The results indicate that the body force still has to be modelled more extensively above the encapsulated electrode, so that the horizontal and vertical components of induced velocities are accurately obtained.