Temperature Field At The Twin-roll Casting
Of Aluminium Alloys: Computational Model
And Measurements
Author(s)
H. Gjerkeš, S. Hartman, R. Vertnik & B. Šarler
Abstract
Industrial twin-roll casting of aluminium alloys requires optimisation of
connections between process parameters and product properties. To a large
extent, the cast strip properties depend on the spatial and temporal characteristics
of heat transfer from the cast strip, which needs estimation of the influence of
process parameters on the temperature field and temperature gradients in a strip
for various alloys, which are cast on an industrial machine. For this purpose, the
recently developed meshless Local Radial Basis Function Collocation Method
(LRBFCM) was used in the simulation of heat transfer from the strip. The
solution of the nonlinear convection-diffusion equation is based on a mixture
continuum formulation of the energy transport in solid-liquid phase change
systems. Simulation results were compared with experimental values, which
were obtained during the industrial production process. They were measured in
situ by the specially designed apparatus with fast response thermocouples, which
can measure the time-dependent temperature of the cast strip in several locations
on the moving strip surface simultaneously. The time-dependent measurement
was coupled with a digital camera recording to gather the spatial domain
measurement of temperature. The differences between the numerical simulation
and experimental results were smaller than 6 K. An explanation for the
discrepancy is given.
Keywords: twin-roll casting, aluminium alloys, measurements, surface
temperature, meshless method, radial basis functions.
Keywords
twin-roll casting, aluminium alloys, measurements, surface
temperature, meshless method, radial basis functions.
Related Book
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