Engineering Workspace Setup

This chapter covers the simulation capabilities of the MOEBIUS solver, how the engineering module is organized in the user interface, performance characteristics, and where to find help.

Simulation Capabilities

LeaRes uses the MOEBIUS Lattice Boltzmann solver. The current production workflow supports:

Fluid Flow

• Incompressible Navier–Stokes (LBM formulation)
• Laminar and weakly turbulent regimes
• A fluid material library: Air, Water, Blood, Cerebrospinal, Urine
• Time-evolving simulations (LBM is intrinsically transient)

Scalar Transport

• Advection–Diffusion–Reaction for species concentration and passive scalars

Turbulence

• Smagorinsky and Shear-Improved Smagorinsky subgrid models plus an ADM filter — present in the solver, but not enabled by the standard LeaRes launch path

The standard chatbot- and UI-driven workflow exposes the above. FSI, conjugate heat transfer with deformable solids, and user-defined Python physics are not part of the standard offering.

User Interface Navigation

The Engineering module is organized hierarchically in the ActionsTree:

Project
└── Version (version_0, version_1, …)
    ├── Geometries      ← primary geometry + implanted devices
    ├── Materials
    ├── Boundaries      ← boundary conditions; zones attach here
    ├── Conditions      ← domain-wide conditions (gravity, fan, obstacle, …)
    ├── Centerlines
    └── Simulations
        └── job_0, job_1, …

Each container shows its item count, for example Boundaries (3).

Zones do not appear in the tree. They are managed from the Zoning tools group in the viewer toolbar — see Defining Zones.

Performance and Scalability

MOEBIUS solver features:

• Execution: single-GPU CUDA-Fortran by default; MPI domain decomposition (mpirun -np N) on the CPU build. Runs that include an implanted device fall back to the CPU/MPI path automatically, because immersed-boundary coupling is CPU-only.
• Scalability: Handle geometries from simple tubes to complex vascular networks
• Real-Time Updates: WebSocket communication provides live simulation progress
• Cloud Ready: Simulations can run on local machines or cloud infrastructure

Getting Help

Throughout the Engineering Workflow:

• Hover over UI elements for tooltips
• Open the tutorials panel with Show me the tutorial in the chatbot shortcut bar
• Review validation messages for configuration errors
• Contact support for complex simulation setup

Tip: Start with a simple geometry and known boundary conditions to familiarize yourself with the workflow before tackling complex simulations.

Next Steps

Ready to begin? Proceed to Importing Geometry to learn how to bring your 3D models into LeaRes.