Hello everyone, I’m having trouble enforcing a moving boundary condition in my simulation. One end of the boundary is supposed to follow the position vector [0,0,sin⁡(πt)] but after running the simulation, I see that the x-coordinate of the boundary is not staying at zero as expected. I can’t figur…

[image] ravi: x = r.x.array[0::3] # Start at index 0, take every 3rd element y = r.x.array[1::3] # Start at index 1, take every 3rd element z = r.x.array[2::3] # Start at index 2, take every 3rd element You shouldn’t rely on this. There is no guarantee that DOFs are oredered in…

Thank you for your insight.I have solved my problem by locating Dof of the boundary usinglocate_dofs_topological and assigning values directly .Here’s a code snippet of boundary condition that might help others facing a similar problem. s0_location = mesh.locate_entities_boundary(domain,0,left_boun…

Can I ask what physics you are trying to solve?

Regarding moving boundary

dolfinx

dokken November 26, 2024, 7:40am 3

Various maps between mesh nodes, degrees of freedom and vertices have been explained to some extent in: How to apply a boundary condition to a range of DOFs? - #7 by dokken

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Regarding moving boundary

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