Finite Element Methods for Arc Discharge Simulation

Abstract

The numerical simulation of industrial arc discharge processes, such as plasma spraying, cutting, and welding, faces severe challenges that include resolution of multiscale features, multiphysics coupling, and robustness in the presence of large gradients. A review of Finite Element Methods (FEMs), particularly the Variational Multiscale (VMS) method, applied to arc discharge simulation is presented. The plasma is modeled as a compressible electromagnetic fluid in chemical equilibrium and thermodynamic nonequilibrium (NLTE). The effectiveness of the NLTE model and the VMS‐FEM is demonstrated with the simulation of canonical and industrially relevant arc discharges, namely the plasma flow in transferred and non‐transferred arc plasma torches and the free‐burning arc.

In vitro Demonstration of Cancer Inhibiting Properties from Stratified Self-Organized Plasma-Liquid Interface

“…Atmospheric pressure glow discharge and micro-discharge plasma with self-organized patterns is a growing research area attracting strong attention of experts in various fields to deeply explore the physical mechanisms behind the self-organization [17,18]. Apart from the fascinating phenomena, the effect of µAPGDP on tumor and plasma-activated cancer therapy media are among the most important features of this system.…”

A Comparative Study of Power Frequency Arcs Influenced by Negative-Polarity Artificial Pulses

“…For a clearer understanding, the simulation procedures are shown in Figure 2. The physical field modules are based on a finite-element analysis [18]- [22] that simulate the PFA, taking into account the NPAP. The electric currents module must first convert input electrical energy into the thermal energy of the arc plasma.…”

Cold atmospheric plasma with self-organized patterns for cancer therapy

“…Due to the large diversity of physical and chemical phenomena involved plasma processes related to self-organization are rather complicated for their theoretical understanding [14,15]. Theoretical models of plasma discharge in ambient gas, including the most basic ones, admit multiple solutions existing for the same discharge current.…”

“…The other existing solutions are in all the cases multidimensional and describe modes with different configurations of cathode spots. The hypothesis of multiple solutions existence was proposed in 1963 for arc-cathode interaction and derived in 1988 for plasma discharge [14]. Currently, solutions describing diffuse and spot modes of current transfer to cathodes of high-pressure arc discharges have been computed under different conditions by different research groups and validated by extensive comparison with the experiment [16,17].…”