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OPENFOAM® is a registered trade mark of OpenCFD Limited. EnergyPlus™ is a trademark of the US Department of Energy. Radiance™ is a trademark of The Regents of the University of California. NVIDIA® and RTX are trademarks of NVIDIA Corporation. LuxCoreRender is an open‑source physically based renderer.

CFD Building Simulation
Why FlowSIM Pro with OpenFOAM is the best combination

About FlowSIM Pro

Professional CFD workflows for architecture, building physics, and MEP. With OpenFOAM as the solver, you pay no per‑CPU‑core license fees — whether you run on 8 or 128 cores. The code is validated and advanced by thousands of researchers worldwide. FlowSIM Pro makes this power accessible.

The Problem

Anyone using OpenFOAM without a GUI knows the effort: edit every file manually, enter boundary conditions by hand, create meshes externally. Solving makes up only about 20% of the time in a typical simulation — only faster hardware helps here. Another 20% goes into analysis and documentation. The remaining 60% is tied up in preprocessing — and this is exactly where FlowSIM Pro comes in.

The Solution

FlowSIM Pro cuts exactly this overhead. Import architectural models directly as IFC 4x3, Rhino, or SketchUp. If you only have 2D plans as DWG or DXF, model rooms with the integrated 3D tools. Where possible, the tool assigns boundary conditions automatically and generates all OpenFOAM files required to start the simulation. The result: preprocessing drops from 60% to 20% or less.

What It Means for You

Offer projects more cost‑effectively, maintain high quality, and deliver faster than with conventional workflows.

Industry Examples

Open‑space office: draft and comfort fields
Open‑space office: draft, operative temperature, and comfort (PMV/PPD).
Classroom: CO₂ distribution and fresh air
Classroom: CO₂ distribution and fresh air guidance.
Double façade: airflow, temperature, g‑value
Double façade: airflow, temperature distribution, g‑value effects.
Large space: airflow and supply
Large space: airflow, supply and exhaust — identify hotspots.
Aerosol/virus spread: particle paths
Aerosol/virus spread: particle paths and dilution.
Laboratory: fume hoods, pressure cascades
Laboratory: fume hoods, pressure cascades, containment.

Workflow

Import IFC/3D, guided setup (domain, boundary conditions, sources/sinks), run OpenFOAM, and analyze fields and cuts in‑app.

Performance & Rendering

Multicore‑optimized engine for large models, NVIDIA RTX ray tracing with AI‑denoising, LuxCoreRender for PBR, and VR via OpenXR.

Comfort (DIN EN ISO 7730)

PMV, PPD, draft risk, operative temperature, Age of Air, and local air change for comfort analyses in indoor spaces.

Compatibility

Runs on Windows and Linux. OpenFOAM® v2512+ add‑on is available for Windows. Share results across the project without external viewer installs.

FAQ

Which OpenFOAM version is supported?

We integrate OpenFOAM® v2512+ (Windows add‑on). Linux users can use their existing OpenFOAM install.

Do I need ParaView?

No. Typical CFD post‑processing is available directly in FlowSIM Pro.

Do you support VR?

Yes — via OpenXR for immersive reviews and presentations.

Do I need to be a pro?

No, but basic CFD experience helps. The main challenge is combining boundary conditions sensibly. Building cases are more constrained; FlowSIM Pro guides typical setups.

Hardware recommendations?

Local solves work well with many CPU cores, ample RAM (e.g., 16–64 GB for typical building cases, more for large models), and a fast SSD. GPU accelerates visualization/VR.

Cloud runs?

Yes — run directly from the GUI on AWS EC2. Pick an instance, start, monitor; billing via your AWS account.