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Unknown degree of freedom when trying to solve an FSI model
Posted 22 mai 2010, 11:37 UTC−4 3 Replies
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Hello,
I am trying to model a robot inside a water pipe and am interested in finding out the forces exerted on the robot due to the flow of water. I have modelled a pipe and a simple robot representation and have imported and positioned those in COMSOL. I also modelled some caps which I have placed on either end of the pipe. Under the FSI node, I added inlet and outlet boundary conditions (using the caps) and then added a fixed constraint to everything (since nothing will move). After meshing and trying to solve the simulation I get the following error:
Unknown degree of freedom. - Degree of freedom: x at (0.5, 0, 0)
How can I repair this?
Thanks
--Amr
P.S. Model file attached
I am trying to model a robot inside a water pipe and am interested in finding out the forces exerted on the robot due to the flow of water. I have modelled a pipe and a simple robot representation and have imported and positioned those in COMSOL. I also modelled some caps which I have placed on either end of the pipe. Under the FSI node, I added inlet and outlet boundary conditions (using the caps) and then added a fixed constraint to everything (since nothing will move). After meshing and trying to solve the simulation I get the following error:
Unknown degree of freedom. - Degree of freedom: x at (0.5, 0, 0)
How can I repair this?
Thanks
--Amr
P.S. Model file attached
Attachments:
3 Replies Last Post 24 juin 2010, 09:39 UTC−4