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RESEARCH PAPERS: Processes Equipment and Devices

Modeling of Fluid Dynamics and Heat Transfer Induced by Dielectric Barrier Plasma Actuator

[+] Author and Article Information
Balaji Jayaraman1

Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32611jbalaji@ufl.edu

Siddharth Thakur

Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32611

Wei Shyy

Department of Aerospace Engineering, University of Michigan, Ann Arbor, MI 48109

1

Corresponding author.

J. Heat Transfer 129(4), 517-525 (Jan 02, 2007) (9 pages) doi:10.1115/1.2709659 History: Received April 05, 2006; Revised January 02, 2007

Glow discharge at atmospheric pressure using a dielectric barrier discharge can induce fluid flow, and can be used for active control of aerodynamics and heat transfer. In the present work, a modeling framework is presented to study the evolution and interaction of such athermal nonequilibrium plasma discharges in conjunction with low Mach number fluid dynamics and heat transfer. The model is self-consistent, coupling the first-principles-based discharge dynamics with the fluid dynamics and heat transfer equations. Under atmospheric pressure, the discharge can be simulated using a plasma–fluid instead of a kinetic model. The plasma and fluid species are treated as a two-fluid system coupled through force and pressure interactions, over decades of length and time scales. The multiple-scale processes such as convection, diffusion, and reaction/ionization mechanisms make the transport equations of the plasma dynamics stiff. To handle the stiffness, a finite-volume operator-split algorithm capable of conserving space charge is employed. A body force treatment is devised to link the plasma dynamics and thermo-fluid dynamics. The potential of the actuator for flow control and thermal management is illustrated using case studies.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Illustration of glow discharge induced fluid flow

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Figure 2

Plasma modeling hierarchy

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Figure 3

2D computational domain with boundary conditions

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Figure 4

Plasma dynamics based force calculation using the electric field and number density distributions are illustrated here. Results are compared at two different time instants belonging to the opposite half-cycles. The positive force values correspond to the positive x,y axes.

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Figure 5

Resulting flow field obtained from detailed plasma dynamics computed from the plasma–fluid model at the instant ωt=π∕2

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Figure 6

Assessement of the plasma force model using experimental data

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Figure 7

Aerodynamics and heat transfer potential of a representative plasma actuator

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