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The 3D standard k - ?? model coupled with the volume of fluid (VOF) method of water-air two-phase flow is established in long-distance diversion tunnel with free flow. The method of wall functions which considers the roughness of the walls is utilized near the walls, and the method of pressure-implicit with splitting of operators (PISO) is applied to solve the unsteady water-air two-phase flow field...
The special mold temperature control (MTC) foundry numerical computational software MFNS was developed based on software engineering theory. The researches on mathematical models of MTC foundry process including heat transfer equation and finite element numerical model were done. In software requirement analysis, the system logic model was established by the data flow diagram and data dictionary....
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