LinearizedEuler3D

[github-actions[bot]]

Review checklist

This checklist is meant to assist creators of PRs (to let them know what reviewers will typically look for) and reviewers (to guide them in a structured review process). Items do not need to be checked explicitly for a PR to be eligible for merging.

Purpose and scope

• [ ] The PR has a single goal that is clear from the PR title and/or description.
• [ ] All code changes represent a single set of modifications that logically belong together.
• [ ] No more than 500 lines of code are changed or there is no obvious way to split the PR into multiple PRs.

Code quality

• [ ] The code can be understood easily.
• [ ] Newly introduced names for variables etc. are self-descriptive and consistent with existing naming conventions.
• [ ] There are no redundancies that can be removed by simple modularization/refactoring.
• [ ] There are no leftover debug statements or commented code sections.
• [ ] The code adheres to our conventions and style guide, and to the Julia guidelines.

Documentation

• [ ] New functions and types are documented with a docstring or top-level comment.
• [ ] Relevant publications are referenced in docstrings (see example for formatting).
• [ ] Inline comments are used to document longer or unusual code sections.
• [ ] Comments describe intent ("why?") and not just functionality ("what?").
• [ ] If the PR introduces a significant change or new feature, it is documented in NEWS.md.

Testing

• [ ] The PR passes all tests.
• [ ] New or modified lines of code are covered by tests.
• [ ] New or modified tests run in less then 10 seconds.

Performance

• [ ] There are no type instabilities or memory allocations in performance-critical parts.
• [ ] If the PR intent is to improve performance, before/after time measurements are posted in the PR.

Verification

• [ ] The correctness of the code was verified using appropriate tests.
• [ ] If new equations/methods are added, a convergence test has been run and the results are posted in the PR.

Created with :heart: by the Trixi.jl community.

[DanielDoehring]

Thanks @lchristm ! I slightly adjusted the wall example, the rest I left untouched.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 95.04950% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 96.30%. Comparing base (b1a84a6) to head (fc7e86b).

Files	Patch %	Lines
src/equations/linearized_euler_3d.jl	94.74%	5 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1903 +/- ## ========================================== + Coverage 96.12% 96.30% +0.18% ========================================== Files 448 450 +2 Lines 36081 36182 +101 ========================================== + Hits 34682 34843 +161 + Misses 1399 1339 -60 ``` | [Flag](https://app.codecov.io/gh/trixi-framework/Trixi.jl/pull/1903/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=trixi-framework) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/trixi-framework/Trixi.jl/pull/1903/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=trixi-framework) | `96.30% <95.05%> (+0.18%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=trixi-framework#carryforward-flags-in-the-pull-request-comment) to find out more.

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[DanielDoehring]

IMO, this is ready to go - any mergers @andrewwinters5000 @jlchan @ranocha @sloede ?

[sloede]

Note: EOC numbers to confirm expected convergence can be found here: https://github.com/trixi-framework/Trixi.jl/pull/1903#discussion_r1565415218