| Numerical analysis is made to see how to control the defects caused by fluid flow and solidification in the casting process. With SIMPLER algorithm the Marker Method that is induced in the MAC or SMAC method has been adopted to analyse the behavior of the free surface in the mold. The normal and the tangential stress condition have been used as free surface boundary conditions. The flow field and thermal behavior is investigated from the start of the filling process to the final solidification. The flow is assumed to be 2-D, incompressible, and laminar, and the material is pure aluminium. Calculation domain was organized on the basis of the staggered mesh generation. For one model, different inlet condition has been applied to estimate the flow, solidification, the free surface position, and the phase change surface motion. This result is helpful to find the most desirable mold design. |
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