DRBEM computational modelling and non-destructive experiments for surface heat flux determination in direct chill casting of aluminium alloy billets
Založnik, Miha ; Šarler, Božidar ; Bajsič, Ivan
The knowledge of the heat flux on the billet surface is required in computational modelling of the direct-chill (DC) casting process. It is particularly important in the submould direct-chill region ...due to the large heat fluxes. To gather detailed information on the convective heat transfer in the direct-chill region, experimental data is needed. In the present work a nondestructive maeasurement technique for the determination of the local heat flux based on measurement of the water film temperature is proposed. Experiments using the new technique were carried out in a real plant environment. The results were implemented into a dual reciprocity boundary element method (DRBEM) computational model by a modification of the boundary conditions in the direct-chill region. Simultations using standard Weckman-Niessen based modified boundary conditions were performed and compared with the ones obrtained through destructive measurements.
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