Sintering neck calculation

[HPL001]

Dear moose community,
hello. I am doing the sintering calculation between two particles, I want to output the change curve of the sintering neck in the post-processing, how should I operate?do I need to use NodalVariableValue or something?

[GiudGiud]

hello

In the postprocessing? So you want to modify the mesh then or just compute a new value for an existing quantity?
NodalVariableValue lets you output a value. If you want to use this value into a new postprocessor, you can use the ParsedPostprocessor