can we operator split within VODE?
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Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 25/100
Research direction
Start by locating the VODE implementation and its current coupled energy/species update and Jacobian path. Analyze whether the proposed explicit temperature treatment preserves the required accuracy and stability, and document the resulting design and validation criteria for the operator split.
Written by the indexing model from the issue text.
Description
Right now we solve the system:
$X^{n+1}_k = \dot{\omega}_k (\rho, T^{n+1}, X_k^{n+1})$
$e^{n+1} = \dot{S} (\rho, T^{n+1}, X_k^{n+1})$
but what if we treated the energy/temperature update explicitly. We are substepping in VODE, so we could still be accurate / stable (?) if we did:
$X^{n+1}_k = \dot{\omega}_k (\rho, T^{n}, X_k^{n+1})$
$e^{n+1} = \dot{S} (\rho, T^{n}, X_k^{n+1})$
the advantage of this is that the Jacobian then does not need any temperature derivatives, significantly simplifying it and making issues like #729 a non-issue.
- Dominant language
- C++
- Stars
- 44
- Forks
- 46
- Avg merge
- 3d 7h
- Merged PRs (30d)
- 10
Getting set up
This project ships no dev container, Dockerfile or contributing guide, so setting up is up to you: start from its README, and see our first-contribution guide for the general steps.
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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