Numerical simulation study on the floating of inclusions of different shapes in steel in super-gravity field

In order to study the influence of the shape of inclusions on their floating behavior in the liquid steel, three shapes of inclusions with different aspect ratios were simulated in the super-gravity field using the fluid-solid coupling method to track the calculated fluid-solid interface state. The results show that the floating velocity of the inclusions is related to their own shape and floating angle, and the faster the floating speed is the closer the aspect ratio is to 1 or the floating angle is to vertical. In the supergravity field of G=1000, the inclusions with length of 1μm did not occur rotation; the inclusions with length of 10 and 20μm would rotate from the initial angle (45°, 90°) to horizontal and then float steadily. As the gravity coefficient decreases, the rotation speed of the inclusions gradually decreases, and when G=50, the inclusions with a length of 20μm (initial angle of 90°) fail to rotate completely; it also proves that the inclusions that are initially inclined are more likely to rotate compared to vertical angle.Finally, it is pointed out in this paper that the prediction of the supergravity treatment time using this model should be based on the floating velocity of the inclusions in the horizontal state, and the approximate time for the floating removal of the inclusions is given based on this conclusion.