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Dynamic mesh. define_grid_motion

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Old   July 15, 2016, 15:41
Question Dynamic mesh. define_grid_motion
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I want to change the position of the node in each time step. I Wrote a udf . But in the right side of geometry as seen in the picture, when looping over nodes , the nodes number 1 and 2 are node ordered . i mean the y value of 2 is higher than 1 . But after 2 all nodes y coordination decreases.
What can a do for this problem that my node 1 has higher value?

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define_grid_motion, dynamic mesh, udf

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