AWolf81

Openfoam Electronics Cooling Skill — Development skill for Claude Code

Development community

Claude Code skill for thermal simulation of power electronics.

How to install Openfoam Electronics Cooling Skill

This entry records only its repository, not the path inside it, so there is no exact command to give. Open AWolf81/openfoam-electronics-cooling-skill and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Openfoam Electronics Cooling Skill does

Claude Code skill for thermal simulation of power electronics. Describe MOSFETs on a board and heat sink in one YAML file and get the losses, a hand-calc thermal network, a checked OpenFOAM conjugate-heat-transfer CFD run (free convection or fan, with radiation) and a PDF report. Tested on Infineon's 48V 300 A battery switch.

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README

openfoam-electronics-cooling

A [Claude Code](https://claude.com/claude-code) skill for thermal simulation of power electronics: MOSFETs, IGBTs, diodes or regulators on an IMS or PCB, mounted to a finned aluminium heat sink and cooled by free convection or a fan, with radiation.

You describe the design in one YAML file. The skill then works through these steps:

Losses, with Rds(on) at temperature.
Hand calculation with a thermal network. It is the yardstick for the CFD, and sometimes it already answers the question.
CFD of conjugate heat transfer (chtMultiRegionSimpleFoam, OpenFOAM v2412 in Docker).
Checks: energy balance, convergence, and hand calc against CFD.
Report in Word/PDF with junction temperatures, margins, figures and a warm-up video.

Install

git clone https://github.com/AWolf81/openfoam-electronics-cooling-skill ~/.claude/skills/openfoam-electronics-cooling
bash ~/.claude/skills/openfoam-electronics-cooling/scripts/setup_env.sh

The target folder must be named `openfoam-electronics-cooling`, the skill's name.

Requirements:

Docker. The OpenFOAM image opencfd/openfoam-default:2412 (about 2.2 GB) is pulled on first run.
uv, for the Python environment used by reports and renders.

Usage

Start Claude Code in a new folder for your design. The skill writes `case.yaml` and all CFD cases under `cases/` there.

mkdir -p ~/thermal/my-power-stage && cd ~/thermal/my-power-stage
claude

Then describe the design, with as many numbers as you have:

Will my power stage overheat? 10 MOSFETs (IAUT300N08S5N011, TOLL) as 5 back-to-back pairs at 300 A continuous, 25 °C ambient. Copper-core board, 100 × 75 mm, on a Fischer SK 81 heat sink, black anodised. A 12 V PC fan blows along the fins. Do a hand calc first, then run the CFD and give me a report.

Datasheets, a reference manual (PDF or link) and the board layout help: Claude reads the values from them.