Abstract: The mutual verification of 1∶1 physical simulation and numerical simulation was used to analyze the effects of casting speed, submerged depth of SEN and width of mold section on the flow field of the mold.The results show that when the section is 230 mm×1 490 mm and the submerged depth of nozzle is 150 mm, the casting speed increases from 1.3 m/min to 1.7 m/min, the maximum surface velocity increases from 0.21 m/s to 0.32 m/s, and the average increase of liquid level fluctuation 21.1%. When the section is 230 mm×1 490 mm and the casting speed is 1.7 m/min, the submerged depth of nozzle is reduced from 190 mm to 150 mm, the maximum surface velocity is increased from 0.26 m/s to 0.32 m/s，and the average increase of liquid level fluctuation is 30.6%. The section width of the mold is increased from 940 mm to 1 490 mm, and the liquid surface flow velocity and liquid level fluctuation are increased due to the increase in the amount of steel passing through. When the factors change, the increase of the angular velocity is much smaller than that of other parts, so the corner is a dead zone in the flow field.According to the water model data analysis, the most important influence on the liquid surface velocity is the change of the casting speed. The maximum influence of the liquid surface fluctuation is the section width of the mold, followed by the insertion depth of SEN, and the smallest is the pulling speed.

Key words: 1∶1 water mold, numerical simulation, liquid surface velocity, liquid level fluctuation, corner flow field