DRBEM Computational Modelling And Non-destructive Experiments For Surface Heat Flux Determination In Direct Chill Casting Of Aluminium Alloy Billets
Free (open access)
M Založnik, B Šarler & I Bajsic
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 sub mould 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 measurement 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. Simulations using standard Weckman-Niessen based modified boundary conditions were performed and compared with the ones obtained through destructive measurements.