The Possible Role of Turbulence in GTA Weld Pool Behavior

摘要: A critical comparison of ex­ perimental measurements and the theo­ retical prediction weld pool shapes in gas tungsten arc welding operations sug­ gests that postulate laminar flow behavior may not pro­ vide a realistic shapes, especially for pools deeper than about 1 mm. Furthermore, there appears to be considerable body evidence suggests turbulent or at least transitional. In this paper, preliminary computed results are presented describ­ ing circulation using various turbulence models, these ap­ pear provide much better agreement with measurements. These findings gest previous modeling efforts pos­ tulating should critically reexamined.