Grain dust moves through ducts. We model where it goes.

flowchart LR
  subgraph IN[Inputs]
    CAD([CAD: Onshape, STEP, STL]):::start
    FIELD([Field markups and site notes]):::start
    CHAT([AI design chat]):::start
  end
  subgraph KJ[KJLabs Simulators]
    FEA[FEA pipeline]:::act
    DUCT[3D duct designer]:::act
    AIR[Airflow and loss simulator]:::act
    FEAS[Fan and cyclone quick-look]:::act
  end
  subgraph SOLVE[Open-source solvers]
    S1[CalculiX, Code_Aster, Elmer, FreeFEM]:::res
    S2[OpenFOAM, Code_Saturne]:::res
  end
  subgraph CS[CompliSpec]
    REQ[Requirements as code]:::act
    CHK{Can the rule be checked?}:::dec
  end
  CAD --> FEA
  CHAT --> FEA
  FIELD --> DUCT
  FEA --> S1
  AIR --> S2
  FEAS --> S2
  DUCT --> AIR
  S1 --> REQ
  DUCT --> REQ
  REQ --> CHK
  CHK -->|yes| PF[Pass or fail with source]:::res
  CHK -->|procedural| CL[Inspection checklist]:::res
  CHK -->|inputs missing| NC[Not computable: says what is missing]:::warn
  classDef start fill:#ede9fe,stroke:#7c3aed,stroke-width:2px,color:#1e1b4b
  classDef act fill:#dbeafe,stroke:#2563eb,stroke-width:2px,color:#0f172a
  classDef dec fill:#fef3c7,stroke:#d97706,stroke-width:2px,color:#422006
  classDef res fill:#dcfce7,stroke:#16a34a,stroke-width:2px,color:#052e16
  classDef warn fill:#fee2e2,stroke:#dc2626,stroke-width:2px,color:#450a0a

flowchart TD
  S([Start at the filter or cyclone outlet]):::start --> A[Append straights, elbows, reducers]:::act
  A --> W{Need a branch?}:::dec
  W -->|yes| WY[Drop in a wye and pick its side and angle]:::act
  WY --> SZ[Size the branch for transport velocity]:::act
  SZ --> P[Attach pickups at each hood]:::act
  W -->|no| P
  P --> Q{Is each pickup's airflow known?}:::dec
  Q -->|yes| FAM[Family tree totals CFM, FPM and velocity pressure per duct]:::res
  Q -->|no| HELP[Airflow worksheet: displacement, entrainment, hood capture]:::act
  HELP --> Q
  FAM --> L{Is the fitting in a cited loss table?}:::dec
  L -->|yes| LOSS[System loss with table reference]:::res
  L -->|no| NC[Loss left unresolved and flagged]:::warn
  LOSS --> SAVE[Save the layout or export geometry for CFD]:::res
  classDef start fill:#ede9fe,stroke:#7c3aed,stroke-width:2px,color:#1e1b4b
  classDef act fill:#dbeafe,stroke:#2563eb,stroke-width:2px,color:#0f172a
  classDef dec fill:#fef3c7,stroke:#d97706,stroke-width:2px,color:#422006
  classDef res fill:#dcfce7,stroke:#16a34a,stroke-width:2px,color:#052e16
  classDef warn fill:#fee2e2,stroke:#dc2626,stroke-width:2px,color:#450a0a

flowchart LR
  S([Part from Onshape, STEP or STL]):::start --> M[Choose material]:::act
  M --> F{How are supports and loads placed?}:::dec
  F -->|quick| AX[Axis band: min end fixed, max end loaded]:::act
  F -->|precise| PK[Click real CAD faces or place round load patches]:::act
  AX --> PV[Preview node counts]:::act
  PK --> PV
  PV --> MS[Mesh with Gmsh]:::act
  MS --> SV[Solve with CalculiX]:::act
  SV --> LOG{Did the solver log converge?}:::dec
  LOG -->|yes| PNG[Rendered stress plot and saved example]:::res
  LOG -->|no| FIX[Read the log, fix supports, mesh or material]:::warn
  FIX --> MS
  classDef start fill:#ede9fe,stroke:#7c3aed,stroke-width:2px,color:#1e1b4b
  classDef act fill:#dbeafe,stroke:#2563eb,stroke-width:2px,color:#0f172a
  classDef dec fill:#fef3c7,stroke:#d97706,stroke-width:2px,color:#422006
  classDef res fill:#dcfce7,stroke:#16a34a,stroke-width:2px,color:#052e16
  classDef warn fill:#fee2e2,stroke:#dc2626,stroke-width:2px,color:#450a0a

flowchart LR
  K([Engineer's markup or field request]):::start --> C[Change the design tool]:::act
  C --> T[Automated tests check real geometry and node graph]:::act
  T --> TC[Truth checks: every public number has a source]:::act
  TC --> G{All green?}:::dec
  G -->|no| C
  G -->|yes| LIVE[Walk it live the way the engineer clicks]:::act
  LIVE --> MK{Matches the original markup?}:::dec
  MK -->|no| C
  MK -->|yes| REL[Release with changelog]:::res
  classDef start fill:#ede9fe,stroke:#7c3aed,stroke-width:2px,color:#1e1b4b
  classDef act fill:#dbeafe,stroke:#2563eb,stroke-width:2px,color:#0f172a
  classDef dec fill:#fef3c7,stroke:#d97706,stroke-width:2px,color:#422006
  classDef res fill:#dcfce7,stroke:#16a34a,stroke-width:2px,color:#052e16