With using three-dimensional math model established by ANSYS Fluent software the numerical simulation on flow distribution in nozzle and pool area designed for 6. 5% Si high silicon steel twin-roll 2. 0 mm thin strip casting has been carried out and according to calculated results 1/4 model of liquid flowing and heat transferring the original designed structure is optimized

that is canceling the contacted angle between flow distribution holes and pool to ensure whole cross sectional area of holes constant

modifying the flow direction of straight holes from K to X

designing 3 horizontal flow holes

i. e. double 10 mm x 12 mm holes and one 21 mm x 12 mm hole with distance between the holes- 33 mm

while changing the cross section area of oblique flow hole to 7 mm x 10 mm. The simulated results verify that optimized structure is more available to formation of solidification zone.