Slide 2:
Problem Statement:
Calculation of the temperature distribution and the associated thermal stresses during the upward casting process.
For this Fluent software is used which is based on the finite volume method (FVM) and uses an enthalpy-porosity method for modelling the solidification.
Slide 4:
Inlet Section:
Uniform Velocity u = 95 mm/min
Temperature T
In the Mould:
Natural Convection
h = 4500 W/m2/K
T = 20 deg celsius
After the mould:
h = 10 W/m2/K
T = 20 deg celsius
e = 0.8 (radiation)
Slide 10:
Free surface and hot top boundary:
All boundary conditions are treated as the static
adiabatic wall
Mold cooling boundary:
The velocity and the turbulence boundary
conditions are set to the static wall, the thermal
boundary condition is treated as cauchy-type
boundary condition, which is formulated as
Kthermal * (dT/dn) = h[T-T(environment)]
T(environment) = 323
Secondary cooling boundary:
The velocity and turbulence boundary conditions are treated as the moving wall and
its moving velocity is 0.00144m/s.
Slide 15:
Outlet:
u = 0.001m/s
ang velocity = 1 rad/sec
T = 500 K
Bottom wall:
T = 1300 K
Free surface:
Thermal Condition
h = 100 W/m2-K
T = 1500 K
Shear Condition
Surface tension gradient = -0.00036 N/m-K
Slide 16:
Side wall:
T = 1400k
Solid wall:
Thermal condition
T = 500 K
Wall motion
u = 1 rad/sec