Hg. Fan et Yw. Shi, NUMERICAL-SIMULATION OF THE ARC PRESSURE IN GAS TUNGSTEN ARC-WELDING, Journal of materials processing technology, 61(3), 1996, pp. 302-308
A two-dimensional axisymmetric numerical model has been developed to d
escribe the heat transfer and fluid flow in the gas tungsten welding a
re. The electrode-tip geometry is considered in the model and the cath
ode and are column regions are included in the solution of the current
continuity equation. The magneto-hydrodynamics equations are solved u
sing the SIMPLE algorithm. The prediction of the are column temperatur
es is in fair agreement with experimental results; moreover, the compu
ted results indicate that the distributions of are parameters such as
current density, electromagnetic force and velocities, reflect well th
e generating mechanism of the are pressure. In addition, the effects o
f the current, the electrode-tip angle and the are length on the are p
ressure distribution are analyzed by the use of the are model that has
been developed.