High Efficiency and 3-D Solidification Simulation System Run on Personal Computer

摘要

Using the alternating direction implicit method (ADI Method), 3-D heat transfer equations are discretized from the opposite direction (positive and negative directions of the coordinate axis), the functions U and V which have the same initial and boundary conditions as the actual temperature (7) are obtained, and the actual temperature (7) is calculated by averaging U and V ((U+ V) /2). The time step of this method is 5-10 times greater than that of the forward difference method, and thus the calculation speed is 2.5-5 times faster. The development of foundry CAE pre/post processor for Windows enables complicated 3-D casting profiles to be input. The calculation accuracy is tested by comparison between analytical solutions and experimental results. In addition, the calculation results of more than 50 castings which weigh from over 10 kg to 30000 kg illustrate: the average calculation time is only 2-3 hours, large-scale and high speed calculation of 1 million elements can be achieved.