Based on the twin-belt jet cooling caster which was designed to prepare the amorphous alloys strip

a VOF three-dimensional thermal-hydraulic coupling model of molten pool was established by considering interactions between liquid and air layer.The rationalization of the new feeding system structure design was validated by comparative analysis.The influence of nozzle angle and immersion depth on flow and temperature fields distributions was investigated.The results show that the new feeding system can reduce level fluctuation in side confinement effectively

and both flow and temperature field present a kind of"double waves"phenomenon with nozzle angle and immersion change.With every additional 15°nozzle angle of the feeding system

the liquid surface speed waves are reduced by 0.015 m/s and the temperature waves are reduced by 10℃

while each additional 5 mm immersion depth

the liquid surface speed waves are reduced by 0.01 m/s and the temperature waves are reduced by15℃.In addition

flow and temperature fields are distributed more reasonable when nozzle angle is 30°and immersion depth is 25 mm.