Ferrite-FEM/Ferrite.jl

Ability to add prefixes and suffixes to implied names in vtk export

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#1,308 opened on Mar 18, 2026

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good first issue

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Description

Currently, the functions write_solution accepts the arg suffix to append to the field name when exporting. However, write_cellset does not provide this option.

A more consistent way to handle this would be to have

Ferrite.write_solution(vtk, dh, a; prefix = "", suffix = "")
Ferrite.write_cellset(vtk, grid; prefix = "", suffix = "")
Ferrite.write_facetset(vtk, grid; prefix = "", suffix = "")
Ferrite.write_nodeset(vtk, grid; prefix = "", suffix = "")

for all cases. This can be achieved without any breaking API, and IMO the keyword args make this easier to work with than the current suffix arg in write_solution, but that would of course remain supported for backwards compatibility.

This interface would also resolve the discussion here.

Contributor guide

Research direction
Examine the current write solution function's handling of the suffix keyword, then add similar prefix/suffix keyword arguments to write cellset, write facetset, and write nodeset, ensuring backwards compatibility.
Tech stack
julia
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
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Active
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Clear
Prerequisites
GitJulia
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60