Numerical Simulation of a Combined Plasma Arc Based on Sequentially Coupled Physics Analysis
A three-dimensional axisymmetric mathematical model, including the influence of the swirl exiting in the plasma torch, was developed to describe the heat transfer and fluid flow within a combined plasma arc. In this model, a mapping method and a meshing method of variable step-size were adopted to mesh the calculation domain and to improve the computational precision. To overcome the problem issuing from a coexistence of non-transferred arc and transfer arc and a complicated interaction between electric, magnetic, heat flow and fluid flow phenomena in the combined plasma arc, a sequential coupling method and a physical environment approach were introduced into the finite element analysis on the behaviors of combined plasma arc. Furthermore, the characteristics of combined plasma arc such as temperature, velocity, current density and electromagnetic force were studied.
Xie Yi and Li Mi
J. B. Meng et al., "Numerical Simulation of a Combined Plasma Arc Based on Sequentially Coupled Physics Analysis", Advanced Materials Research, Vols. 129-131, pp. 708-713, 2010