Hello, I am trying to mimic the rectangular flap case by constructing the fluid and structure mesh on gmesh and then exporting it to calculix and OpenFOAM with the exact BC as in the tutorial case and all the parameters and the files are the same
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However, I got a strange behavior as indicated in the figure.
There is a certain node at the tip restricted to move, however, the Fix BC is only assigned as in the tutorial exactly and I checked this using the cgx -c command then prnt se and plus n Nfix , and all is good.
So what can be the issue. Thanks in advance.