Numerical Simulation Study on fluid-themal Field of 3003 Aluminium Alloy Melt in Cast-Rolling

The numerical simulation analysis of the fluid-themal of 3003 aluminum alloy cast-rolling was carried out by using FLUENT fluid calculation software. The results show that the flow of aluminum melt in the cavity of the casting nozzle belongs to the excessive flow of the turbulent flow to the laminar flow. Using the low Reynolds number K-E turbulence model in FLUENT, the calculation results are very accurate, and astringency is good. Flow of melt in nozzle-shaped cavity easily produces the eddy vortex. The reason is that when the melt passes through the gap, it is always close to the contour flow of the shunt block on one side of the gap, resulting in insufficient filling of the other area to form a low-pressure "vacuum" area,which is driven by the pressure difference to form eddy currents. The velocity field of the melt plays a decisive role in the temperature field, and the temperature in the region with fast flow rate is relatively high. The nozzle flow of the structure is improper, resulting in uneven melt splitting in each gap, and the melt velocity and flow rate flowing through the gaps are uneven, and finally make the heat flow field at the outlet of the cast nozzle uneven.