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Complex behavior can appear in the modeling of gas discharges even in apparently simple steady‐state situations. Time‐dependent solvers may fail to deliver essential information in such cases. One of such cases considered in this work is the 1D DC discharge. The other case is represented by multiple multidimensional solutions existing in the theory of DC discharges and describing modes of current...
Self-organization in DC glow microdischarges has been observed for the first time a decade ago and represents a very interesting and potentially important phenomenon. Since then, a number of experimental reports on this phenomenon have been published, as well as a theoretical interpretation in terms of multiple solutions existing in the theory of glow discharge; see [1] for a review and detailed discussion.
The most commonly used solvers in models of DC gas discharges are time-dependent solvers. Solutions are obtained by specifying an initial state and following the evolution of the discharge over time until a steady state is reached. In the last 15 years multiple modes of arc-cathode attachment have been computed in high-pressure arc discharges by means of stationary solvers, see review [1]; a procedure...
The most commonly used solvers in models of DC gas discharges are time-dependent solvers. Solutions are obtained by specifying an initial state and following the evolution of the discharge over time until a steady state is reached. The use of time-dependent solvers is so standardized in gas discharge models that the Plasma Module of COMSOL MultiPhysics does not support stationary solvers.
Considerable advances have been achieved during the past decade in understanding plasma-cathode interaction in high-pressure arc discharges. In particular, it has been shown1,2 that the appearance of spots in the cathodic phase of AC operation of high-intensity discharge lamps may be prevented by means of a specially chosen shape of the current wave.
Stationary self-organized patterns of cathodic spots have been observed in DC glow microdischarges in xenon1. Recently, such patterns have been obtained in the numerical modelling2: multiple steady-state solutions have been found for the same discharge current, some of these solutions describing modes with a normal spot and other describing modes with several spots, which are qualitatively similar...
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