JevMade field notes / Python scientific-computing tutorial

Turn a gas-flow description into checked solver inputs

Adam Karchani's Python tutorial uses Jev to match a written gas-flow request to bounded inputs for a small solver, with Claude helping write and use the tool.

Original by Adam Karchani / cfdgasmanIntegrations

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Credits and license

“Jev + Claude for CFD developers” by Adam Karchani / cfdgasman. Read the original source.

This expanded guide is an AI-narrated adaptation of the source’s essential explanation, examples and caveats, not a word-for-word reading. The synthetic voice does not imitate the author or imply their endorsement.

License: MIT

MIT License

Copyright (c) 2026 Adam Karchani

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Our summary

Adam Karchani presents a tool for people studying gas moving through tiny gaps. A user describes the gas and the channel in ordinary words. The tool turns that description into inputs for a calculation, or asks a question or refuses when the request does not fit its scope.

Python finds numbers with units and gives each a tag. Jev's Choice questions identify the flow, geometry and gas, then choose which tagged quantity means the gap, pressure or another input. Code converts units, applies decision rules and solves the equations. Claude helps build the program and manage the conversation.

The solver covers small disturbances between parallel plates, with fully diffuse walls, not general fluid problems. The author reports a sixty-request comparison that was not reproduced here. The README uses a confidence cutoff of 0.45 while the code defaults to 0.6; missing temperature is assumed, and new hosted requests transmit text.

Key takeaways

Ask Jev which tagged quantity has a particular meaning; keep numerical extraction, unit conversion and equations in code.
Offer missing or unsupported answers, and check which required values are assumed rather than asking for every missing detail.
Resolve the documented cutoff mismatch before relying on the benchmark, and check that your physical problem fits the limited solver.

More guides →See the experiments →