NUMERICAL SIMULATION OF CHANNEL SEGREGATION OF Al-4.5wt-%Cu ALLOY

Acta Metall Sin

1990, Vol. 26

Issue (5): 112-118 DOI:

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NUMERICAL SIMULATION OF CHANNEL SEGREGATION OF Al-4.5wt-%Cu ALLOY

YU Qiuping;ZHOU Yaohe Northwestern Polytechnical University; Xi'an

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YU Qiuping;ZHOU Yaohe Northwestern Polytechnical University; Xi'an. NUMERICAL SIMULATION OF CHANNEL SEGREGATION OF Al-4.5wt-%Cu ALLOY. Acta Metall Sin, 1990, 26(5): 112-118.

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Abstract The equations for numerical simulation of channel segregation basedon a model of continuum approach to porous medium were advanced. In order tosolve non-linear computation problems caused by the interaction with each other ofunknown variables in the equations, the trial-and-error method is used. The com-putation results showed that radial back-flow due to natual convection in mushyzone indeed exists in the Al-4.5wt-%Cu alloy ingot under the condition of lowcooling rate, and the numerical simulation of channel segregation is available dueto coincidence of calculating final concentration with the test values.

Key words: channel segregation numerical simulation back-flow mushy zone

Received: 18 May 1990

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1990/V26/I5/112

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