Windows

Windows 10 / 11, 64-bit

A licence key is required to run a simulation on Windows. Install it free, then contact sales for a key.

NSIS installer (.exe)

SimpleCFD Setup 1.2.3

Windows 10 / 11, 64-bit · 687 MB · released July 29, 2026

Standard Windows installer with Start Menu entry and uninstaller. Chains the separate OpenFOAM® v2606 and ParaView installers during setup — both are independent, GPL/open-source products, installed to your user folder (no admin rights required for either).

Download installer (.exe)

Installing

Run the downloaded .exe, choose an install location, and follow the prompts. When it offers to install OpenFOAM® and ParaView, accept both — Simple CFD needs OpenFOAM to mesh and solve, and ParaView is used for the "Open in ParaView" button in Post Process.

Linux

Ubuntu / Debian, 64-bit

Pick whichever packaging you're most comfortable with — all three are the same build. Tested on Ubuntu 24.04.

Free tier — no licence key needed to start

The Linux builds run immediately after install, unlicensed. You get the full app — every solver, boundary condition, fluid, and post-processing view — with two limits:

Meshing is capped at 100,000 cells. A mesh that comes out larger is discarded automatically, with a prompt to either mesh coarser or activate a licence.
Runs are limited to 1 CPU core (serial). Multi-core meshing and solving needs a licence.

Both limits lift the moment you activate a licence — see pricing.

Recommended

Debian package (.deb)

simple-cfd-app 1.2.5

Ubuntu / Debian, amd64 · 74 MB · released Aug 21, 2026

Installs to /opt/SimpleCFD, adds a Start Menu / Activities entry, and offers to install OpenFOAM® v2606 right after setup.

Download .deb

AppImage

SimpleCFD 1.2.5

Any modern x86-64 Linux · 109 MB · released Aug 21, 2026

No install, no root needed — one file you run directly. Good for a quick try, or a distro other than Ubuntu/Debian. You'll need to install OpenFOAM separately (instructions below).

Download AppImage

Snap Store listing pending

Snap package

simplecfd 1.2.5

Ubuntu, amd64 · 92 MB · released Aug 21, 2026

Submitted to the Snap Store and awaiting Canonical's classic-confinement review — snap install simplecfd will work directly once approved. Until then, install the file below manually.

Download .snap

Installing the .deb (recommended for Ubuntu/Debian)

sudo dpkg -i simple-cfd-app_1.2.5_amd64.deb
sudo apt-get install -f

The second line resolves any missing runtime libraries. Setup will offer to install OpenFOAM® v2606 for you — accept it, or run it later with:

sudo bash /opt/SimpleCFD/resources/install-openfoam.sh

Launch it from your Activities/app menu, or from a terminal with simplecfd.

Installing the AppImage

chmod +x SimpleCFD-1.2.5.AppImage
./SimpleCFD-1.2.5.AppImage

The AppImage has no installer step to hook into, so OpenFOAM® needs to go in separately, once, from a terminal:

curl -s https://dl.openfoam.com/add-debian-repo.sh | sudo bash
sudo apt update
sudo apt install -y openfoam2606

Installing the Snap (manual, ahead of Store approval)

Classic-confinement snaps (required here, since Simple CFD spawns the separately installed OpenFOAM® solver executables) need a one-time Canonical review before snap install simplecfd works by name. Until that clears, install the downloaded file directly:

sudo snap install simplecfd_1.2.5_amd64.snap --classic --dangerous

Then install OpenFOAM® the same way as the AppImage instructions above, or via the copy bundled in the snap:

sudo bash /snap/simplecfd/current/install-openfoam.sh

OPENFOAM® is a registered trade mark of OpenCFD Limited, producer and distributor of the OpenFOAM® software via www.openfoam.com. This offering is not approved or endorsed by OpenCFD Limited. Simple CFD does not bundle or modify OpenFOAM — it is a separate, independently installed GPL-licensed product that Simple CFD spawns as external processes.

Download Simple CFD