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分析了在压力容器环缝组对及焊接中存在的错边、间隙不均匀以及焊接中熔池流动等问题。
The problems such as fissure of displacement, slit nonuniform and weld puddle flowing etc at the case of assembling and welding on orbital slit of pressure vessel are analyzed.
最后采用增大热传导系数的方法，考虑了熔池内流体流动对整个温度场的影响。
Finally, the fluid flow of the weld pool was taken into account by increasing the heat conduction coefficient at elevated temperature.
文中概括了近年来焊接熔池传热与流体流动模拟所取得的一些进展，总结了影响熔池传热和流体流动的一些主要因素。
In this paper, some progress attained in recent years on heat transfer and fluid flow in weld pool was summarized, then generalized the factors that influenced heat transfer and fluid flow greatly.
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