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Setup
STL Exporter Safety Toggle Settle Data
Utilities
Atmospheric Boundary Layer Manual Inflow Profile Uniform Flow Download Weather Wind Compass Wind Rose Cluster Ground Roughness Land Cover Roughness Tree Watertight
Outdoor Setup
Cylinder Domain Cell Size Mesh Settings Refinement Region Brep Grid Points
Outdoor Domain Mesh
Load Wind Case Outdoor Case Write Run Scripts
Outdoor Case
Run Run Settings Custom Function Object
Outdoor Simulation
Live Residuals Meshing Progress Plot Residuals Translate Date To Hours Calendar Flow Rates Pedestrian Wind Comfort Velocity Amplification Factors VAF Wind Field Viewer Wind Legend Analysis Period Hour of Year
Outdoor Results
Air Region Building Region Terrain Region Vegetation Region Deconstruct Region Advanced Terrain Mesh Building Mesh Settings Gmsh Mesh Terrain Mesh Settings Vegetation Mesh Settings Building Material Soil Material Terrain Surface Material Vegetation Properties
Outdoor+ Regions
Outdoor+ Case Box Domain Relative Humidity Simulation Mesh Settings Simulation Settings Timing Parameters Weather CheckMesh Check Geometry Parse Case Logs ViewFactors Deconstruct Weather
Outdoor+ Simulation
Indoor Case Indoor Species Case Indoor Inlet Indoor Outlet Indoor Sink Indoor Wall Manikin CO2 Emitter Heat Source Momentum Source Viral Emitter CO2 Air Quality Facade Wind Pressure Occupant CO2 Sleep Comfort Two-Node Comfort Window Air Exchange
Indoor
FluidX3D Run FluidX3D Run Settings LBM Run LBM Run Settings FluidX3D Live View LBM Field
LBM
MRT Sensors MRT Solve MRT Surface MRT View Factors Surface Settings Tree Settings Vegetation Settings MRT MRT Settings Sun Hours Deconstruct MRT Deconstruct VF Model Fisheye View Sky Exposure
MRT Radiation
SurfaceTemp EnergyPlus SurfaceTemp Material SurfaceTemp FFT Deconstruct SurfaceTemp
MRT SurfaceTemp
Thermal Comfort UTCI Simulation Comfort Hours Thermal Comfort Legend
Comfort
Dataset Curator Dataset Reader ML Model MRT Dataset Curator Wind Predictor Wind Comfort Predictor ML GAN Predict Interpolate UMag
ML
Export to Visualizer Open In ParaView Probe Deconstruct Case Face Warnings Read Cells Read checkMesh Create Mesh Create OBJ Cull Ground Mesh Streamlines
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02 Outdoor Setup

Main Components

Atmospheric Boundary Layer
Define atmospheric boundary layer inflow conditions for Eddy3D.
Manual Inflow Profile
Define inflow boundary conditions from a manually entered vertical profile (z/zR, U/UR, k/UR^2) instead of the parametric ABL log-law. Writes fixedProfile inlet conditions for U, k and epsilon. epsilon is derived from the profile as epsilon(z) = Cmu^0.5 * k(z) * d(U)/dz.
Uniform Flow
Create a uniform (constant velocity) inflow boundary condition for Eddy3D.
Download Weather
Download an EPW weather file from a direct URL, or search climate.onebuilding.org by station name, WMO ID, or dataset year.
Wind Compass
Visualize a wind direction on a compass circle. Direction is meteorological degrees (0=N, 90=E, 180=S, 270=W); outputs the flow vector and the 16-point cardinal name.
Wind Rose Cluster
Cluster annual wind directions into representative directions using k-means.
Ground Roughness
Assign a multi-face ground plate to the wind tunnel: each face gets its own aerodynamic roughness length z0 and becomes its own ground patch (nutkAtmRoughWallFunction). Feed into the wind case component's Ground Roughness input.
Land Cover Roughness
Fetch land-cover polygons around a location from OpenStreetMap (open data, Overpass API) and classify each into an aerodynamic roughness length via the Davenport-Wieringa terrain classification. Outputs ready-made ground roughness zones for the wind case.
Tree
Represents a tree as a porous zone for wind blocking (Darcy-Forchheimer). Feed into the wind case component.
Watertight
Combine a multi-part building mesh into a single watertight, CFD-ready solid via the bundled Python mesh service (trimesh/manifold3d/pymeshfix). The server auto-starts locally on the first run (uv-managed Python environment; first start installs it, 1-2 minutes) and is reused afterwards.