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Abstract In continuous casting process, there are many factors
that could affect the cleanliness of molten steel. One of the
important factors is the unsuitable operation. It is necessary
to appraise the effect of variable operating conditions for
cleanliness of molten steel. In this study, a mathematical model
that can calculate the flow pattern in casting mold and the
trajectory of inclusions for variable sizes will be developed.
The numerical method used in this study is explicit finite
difference including full mesh system and partial mesh system.
The calculating scheme based on SOLA and SOLA-SURF is developed
from Los Alamos Laboratory of USA. And the calculating scheme is
expanded to three dimension and it can predict the trajectory of
nonmetallic inclusions. For the choice of numerical test, a
slab caster with simple geometry is selected to check the
mathematical model first. And the submerged nozzle alters the
immersed depths and rotated angles. And then the round billet in
160mm diameter including three kinds of submerged nozzles is
simulated. The pathlines of nonmetallic inclusions are
calculated to estimate the cleanliness of melt. The results are
rather satisfied. The geometry contour is more match the real
caster in partial mesh system. Finally, to compare between the
mathematical mode and water model is used to verify the
accuracy.
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