Abstract
A new simplified algorithm is proposed for numerical simulation of dielectric barrier discharge actuators. It is based on a three-species fluid model and includes five ionic reactions. The reaction rate coefficients are calculated from the Boltzmann equation, and the local field approximation is used. To drastically reduce the computing time, the discharge pulses are artificially damped. Two approximate models for photoionization are implemented and compared. This numerical algorithm is an attempt to compromise two approaches previously proposed: full plasma models, requiring prohibitively long computing time, and phenomenological models, which were based on inadequate physics. The electrical and mechanical characteristics of the electrohydrodynamics flow generated by the discharge are presented and validated by comparing with the experimental data, proving satisfactory accuracy of the model.
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