Thermal and fluid flow modeling of the molten pool behavior during TIG welding by stream vorticity method
Thermal and fluid flow modeling of the molten pool behavior during TIG welding by stream vorticity method
复制标题
通过流涡法对 TIG 焊接过程中熔池行为进行热流和流体流建模
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Younes Benkheda
中科院分区：
文献类型：
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作者：
A. Zitouni;P. Spitéri;M. Aissani;Younes Benkheda
本文对钨惰性气体（TIG）焊池发育过程进行了数值模拟。建立了考虑液固相变的流涡耦合热方程中的Navier-Stokes方程的数学模型。利用不可压缩流体流动中的流涡量公式，通过减少输运方程的数量来解决同样的问题。因此，该模型只考虑一个输运方程（涡度）和一个泊松方程（流）。采用适当的离散化方法，实现了FORTRAN编程和数值模拟，保证了数值方法求解大型稀疏线性代数系统的收敛性。此外，针对Stefen定律描述的焊接过程中的辐射现象，提出了另一种方法。对所得数值结果进行了讨论，并与实验结果进行了验证。
The present paper deals with the numerical simulation of weld pool development in Tungsten Inert Gas (TIG) process. A mathematical model is developed in order to solve the Navier–Stokes equations expressed in the stream–vorticity formulation coupled with heat equation taking into account the liquid solid phase change. Using the stream–vorticity formulation in incompressible fluid flow, the same problem is solved with reducing the number of transport equations. Therefore, only one transport equation (vorticity) and one Poisson equation (stream) are considered in this model. The FORTRAN programming and the numerical simulation are then achieved using appropriate discretization that ensures the convergence of the numerical methods to solve a large and sparse linear algebraic systems. Furthermore, to solve the radiation phenomena during welding described by the Stefen law, another method is proposed. The obtained numerical results are discussed and validate with experimental.