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Vary Acceleration due to gravity

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Old   May 19, 2011, 18:25
Default Vary Acceleration due to gravity
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How can I change the acceleration due to gravity with every iteration using UDF? Is there any macro that can be used?
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Old   May 20, 2011, 01:57
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Hi,
there is something similar:
http://www.cfd-online.com/Forums/flu...direction.html
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