Comprehensive investigation of plasma behavior in diverse gas discharge phenomena: fluid modeling, chaotic dynamics, and synchronization

Date

2023-9-22

Author

Yeşil , Cihan

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The work thoroughly examines various aspects of gas discharge phenomena. The foundational exploration begins with derivations of fluid equations from the kinetic Boltzmann equation. Plasma fluid equations are the foundation for numerical models, including a drift-diffusion approximation of particle fluxes. Self-consistent onedimensional fluid models, the simple and extended fluid models, are developed and compared in addressing fundamental glow discharge requirements. Subsequently, the focus is on the transition from regular to chaotic oscillations in a DC-driven gas discharge–semiconductor system (GDSS) in nitrogen. This aims to understand the transition dynamics by revealing complex relationships among the control parameters. Further, the unpredictability and Delta Synchronization of Chaos (DSC) techniques are studied within the chaotic regime using detailed GDSS fluid models. These techniques validate chaotic solutions and chaos synchronization within the coupled drive and response systems. Furthermore, a comprehensive investigation of boundary conditions is conducted for fluid models of an RF argon discharge. Various boundary conditions are evaluated, emphasizing their impact on discharge behavior and proposing a revision of boundary conditions in commercial computational packages to enhance accuracy and reliability. Finally, the electron Boltzmann solver is developed, enabling the precise calculation of electron transport and rate coefficients for fluid models. The solver is validated against conventional methods. Involving these coefficients in a CO2 dielectric barrier discharge system concludes the necessity for advanced modeling and incorporation of gas heating equations.

Subject Keywords

Gas discharge, Kinetic Boltzmann equation, Chaotic oscillations, Gas discharge–semiconductor system, Chaos synchronization

URI

https://hdl.handle.net/11511/105411

Collections

Graduate School of Natural and Applied Sciences, Thesis