cfd-fluids

# CFD Analysis Skill ## Purpose The CFD Analysis skill provides deep integration with computational fluid dynamics tools for internal and external flow analysis, enabling systematic setup, execution, and post-processing of fluid simulations. ## Capabilities - ANSYS Fluent, CFX, OpenFOAM workflow automation - Mesh generation for complex geometries (structured, unstructured) - Turbulence model selection (k-epsilon, k-omega, SST, LES) - Boundary condition specification (inlet, outlet, wall, symmetry) - Steady-state and transient flow simulations - Post-processing for pressure, velocity, and flow visualization - Mesh independence studies and validation - Pressure drop and flow coefficient calculations ## Usage Guidelines ### Pre-Processing #### Geometry Preparation 1. **CAD Cleanup** - Remove small features (< 3 cells) - Fill gaps and holes - Create smooth transitions - Define fluid domain boundaries 2. **Domain Definition** - Internal flow: Extract fluid volume - External flow: Create far-field boundary - Symmetry: Identify planes of symmetry - Periodic: Define periodic pairs #### Mesh Generation 1. **Mesh Types** | Type | Application | Pros/Cons | |------|-------------|-----------| | Structured hex | Simple geometries | High quality, more effort | | Unstructured tet | Complex geometries | Flexible, more cells | | Polyhedral | Complex internal | Good quality, moderate count | | Hybrid | Mixed regions | Optimized for accuracy |...