Refinement of Initial Course Mesh for Cylindrical Shape

[TLWise]

I created the following mesh in Cubit. The course mesh represent a benchmark mesh. In the benchmark reference, refinements of the mesh converge the interior nodes to a near perfect cylindrical shape. As seen from my refinements of the mesh using MOOSE, the basic initial interior circle-like shape remains not circular.

Is there a way in MOOSE to influence the refined mesh nodes to populate at the same radial distance from the center of the circle?

[GiudGiud]

Hello

Yes there is a mesh modifier to do this:
https://mooseframework.inl.gov/source/meshmodifiers/MoveNodesToSphere.html

There should be more coming in terms of using adaptivity while conserving shapes, but in a 1-2 year time frame

[TLWise]

I attempted to implement, MoveNodesToSphere using the following code:

[modify_radius_points]
type = MoveNodesToSphere
block = 'Fluid'
boundary = 'CylWall'
center = '0.2 0.2'
radius = 0.05
[]

I received this error:

*** ERROR ***
Task add_mesh_generator is not registered to build UserObject derived objects

[TLWise]

I added this code and it eliminated that error.

[UserObjects]
[modify_radius_points]
type = MoveNodesToSphere
block = 'Fluid'
boundary = 'CylWall'
center = '0.2 0.2 0.0'
radius = 0.05
execute_on = end
[]
[]

[TLWise]

The latest error after the start of code execution is this:

We caught a libMesh error in ThreadedElementLoopBase:ERROR: negative Jacobian 0 at point (x,y,z)=(0.217269, 0.153982, 0) in element 18

[TLWise]

I commented out the "block = 'Fluid'" that eliminated the errors and refined the mesh based on a radius. Thanks!

[GiudGiud]

One of the elements is being tangled by the projection.

Try outputting on failed and looking at the tangled mesh

Try applying only one level of adaptivity at a time in between projecting nodes on the circle