7.6.20.12.36. Weld

Syntax

Viscosity [{of} SpeciesName] = Weld [Interpolated = interpolated | Beta = beta | C0 = c0 | C1 = c1 | C2 = c2 | C3 = c3 | T_Liq = T_liq | T_90 = t_90 | T_Max = T_max]

Scope

Aria Material

Summary

This is an empirical model that emulates the melting of a solid metal during the laser welding process.

$\mu\left(T\right)= \begin{cases}\mu_{90} + \left(\mu_{liq} - \mu_{90} \right) \left(\dfrac{T - T_{90}}{T_{liq} - T_{90}}\right) & T < T_{liq} \\c_0 + c_1 \hat{T} + c_2 \hat{T}^2 + c_3 \hat{T}^3 & T \geq T_{liq} ,\end{cases}$

where $\mu_{liq}$ is given by

$\mu_{liq} = c_0 + c_1 T_{liq} + c_2 T_{liq}^2 + c_3 T_{liq}^3 ,$

and where $\mu_{90} = \beta\mu_{liq}$ and $\hat{T} = \min(T,T_{max})$ . The default value of $\beta$ is $10^{11}$ .

Parameter	Value	Default
{of}	{of \| species \| subindex}	–
SpeciesName	string	–
interpolated	integer	0
beta	real	1e+11
c0	real	–
c1	real	–
c2	real	–
c3	real	–
T_liq	real	–
t_90	real	–
T_max	real	–