Advances in Materials Science and Engineering

Research Article

The Effect of Natural Convection on Equiaxed Dendritic Growth: Quantitative Phase-Field Simulation and Comparison with Synchrotron X-Ray Radiography Monitoring Data

Table 1

The parameters used for phase-field simulation of equiaxed dendritic growth of Al-4 wt.%Cu alloy with natural convection.
Solute partition coefficient, 0.14
Liquidus temperature, 933.47 K
Solute diffusion coefficient in solid, 1.15 × 10−8 cm2/s
Solute diffusion coefficient in liquid, 2.4 × 10−5 cm2/s
Gibbs-Thomson coefficient, 2.36 × 10−5 cm⋅K
Liquidus slope, −3.5 K/wt.%
Initial concentration, 4 wt.% Cu
Interface width parameter, 54
Surface energy anisotropy strength, 0.0106
Kinematic viscosity, 5.0 × 10−3 cm2/s
Density, 2.45 g/cm3
Thermal expansion coefficient, 1.0 × 10−4 k−1
Solutal expansion coefficient, 9.2 × 10−3 (wt.%)−1
Gravitational acceleration, −9.8 × 102 cm/s2
Dimensionless friction coefficient, 2.757
Cooling rate, 0.5 K/min