A smart model to estimate effective thermal conductivity and viscosity in the weld pool

A smart model is developed to estimate effective thermal conductivity and viscosity in the weld pool. A multivariable optimization scheme is included in the smart model, within the framework of a phenomenological heat transfer and fluid flow model. The sensitivity of the calculated weld geometry with respect to the unknown parameters is considered by the optimization scheme. The effective thermal conductivity and effective viscosity is calculated by the model for conduction mode laser welding as a conduction of nondimensional heat input from six sets of experimental measurements of weld pool depth and width.