Physics Applications And Computational Simulations (PAACS)
Founded in 2024 in Scotland, PAACS Software Ltd specialises in computational simulations with a focus on the Finite Element Method (FEM). Our mission is to give you tools to simulate complex physical systems with ease and accuracy.
PAACS is designed to empower researchers and engineers with advanced simulation capabilities, enabling them to tackle complex physical problems with confidence and precision. We utlise a node interface for quick iterations, while also providing a scriptable Python backend for full customisation and automation.
Adaptive Mesh Refinement
Node-Based Workflow
Multi-Physics Coupling
Parametric Force Application
High-Performance Solvers
Modular & Customizable
The software will be free for students to use, additionally it will be free for everyone until stated otherwise.
With the nodal interface and industry standard tools, this is simualtion software great for beginners and experts.
Documentation will recieve regular updates so that anyone can quickly learn the newest features.
Founded in 2024 in Scotland. Now headquartered in Austin, Texas.
We build practical simulation tools that fit real engineering workflows—from CAD import to meshing, solving, and results. A node-based workflow speeds iteration; scripting enables automation when you need it.
We ship focused, stable releases and are building academic and industry ties to advance research.
PAACS leverages world-class open-source technologies and a network of academic research to deliver professional-grade simulation capabilities.
We use OCCT as our geometry kernel for robust CAD operations and advanced geometric modeling. Its evolving feature set and performance improvements help us deliver dependable geometry handling and high-quality mesh preparation.
Our solver layer builds on Kratos Multiphysics (developed at CIMNE/UPC), a modular finite-element framework widely used in research and industry. Its architecture allows us to compose workflows for FEA, CFD, and coupled multiphysics.
For adaptive mesh refinement and optimization, we link the MMG library to achieve reliable remeshing and quality control—helping capture gradients and geometric features that matter for accurate simulation.
For a modern, responsive desktop UI with a native feel, we use Slint’s declarative approach and lightweight runtime to build clear, performant interfaces across platforms.
PAACS is made possible by outstanding open-source projects, including Open CASCADE Technology, Kratos Multiphysics, MMG, and Slint. We are grateful to the maintainers, researchers, and contributors behind these tools.
While PAACS is a proprietary product, we carefully observe upstream licenses and provide clear attribution. Our thanks go to the communities whose work we build upon.