The effect of four kinds of baffle structure- U type baffle with guide flow hole angle 30°

and V type baffle respective with guide flow hole angle 20°

25° and 30° on liquid flow characteristics of liquid in a 46 t T type tundish for casting double strands Φ800 mm round bloom are respectively studied by numerical simulation with fluid dynamic software FLUENT and with geometric similarity ratio 1:3 water model

and the distribution of temperature of liquid in tundish is calculated by stable simulation. Results show that both simulated results have better consistence; the flow characteristic of liquid in tundish using V type baffle with guide flow hole angle 20° is best

i. e. the temperature difference of flow at outlet of tundish is only 4.0 K

whole liquid max temperature difference is 14.2 K

longest residence time is 803.1 s and dead zone volume fraction is minimum- 0.09

it is available to move inclusions in liquid and enhance cleanliness of steel.