Abstract: Using ANSYS CFX software and considering the effect of static magnetic field， the behavior of metal jet out from submerged nozzle in continuous casting mold is investigated. With various casting parameters， the variation law of level fluctuation index(F value)and the effect of jet characteristics on the impact strength of jet against the mold wall are all analyzed. The results show that the nozzle jet flow has an expansion feature. Under the static magnetic field， with the magnetic flux density increasing， the F value， metal jet size and impact strength against the mold wide face increase; with the slab thickness increasing， the F value and metal jet size increase， but the impact strength against the mold wide face decreases; with the jet angle increasing， the F value and impact strength against the mold wide face increase. In the continuous casting process with static magnetic field， the F value is not the only control index， and the influence of metal jet expansion on the impact strength against the mold wall should also be considered， i.e. different slab thicknesses and jet angles should have appropriate control variables.

Key words: continuous casting, numerical simulation, static magnetic field, metal jet, F value, impact strength