OpenFOAM Chapter 4 (Section 8): Build Files (fvSchemes, fvSolution, transportProperties) + Set Re скачать в хорошем качестве

OpenFOAM Chapter 4 (Section 8): Build Files (fvSchemes, fvSolution, transportProperties) + Set Re

In OpenFOAM Chapter 4 — Section 8, we continue the “build-from-scratch” workflow. We already have a good mesh (constant/polyMesh) and a minimal system/ folder — now we try running the solver and let OpenFOAM’s error messages guide us خطوة‌به‌خطوه. ✅ Key mindset: OpenFOAM errors are usually a clean checklist of what files are missing. What you’ll do in this section 1) Check current case status Load OpenFOAM (example: 23.06) Run tree Confirm we currently have: constant/polyMesh system/controlDict system/blockMeshDict 2) Run icoFoam and use errors as a to-do list We start with a steady laminar incompressible solver: Run: icoFoam OpenFOAM reports missing files in sequence — we fix them one by one. 3) Add fvSchemes Error: system/fvSchemes not found Fix: copy fvSchemes from a trusted tutorial (like cavity) Keep defaults for now (baseline that works) 4) Add fvSolution Error: system/fvSolution not found Fix: copy from cavity and keep default settings for now 5) Add transportProperties Error: constant/transportProperties not found Fix: copy from cavity Then we set viscosity based on Reynolds number. Set viscosity for Re = 22,000 We want square-cylinder flow at: Reference length: L = 1 (square side length) Inlet velocity: U = 1 m/s Reynolds number: Re = 22000 Using: Re = U L / ν ⇒ ν = U L / Re So: ν = (1 × 1) / 22000 ≈ 4.545e-5 We set: ✅ nu ≈ 4.5e-5 Now icoFoam can read: ✅ controlDict ✅ fvSchemes ✅ fvSolution ✅ transportProperties …and the next thing OpenFOAM asks for is: ✅ the 0/ folder initial/boundary conditions (U and p) Next section In Section 9, we create the 0/ folder and set up: ✅ velocity (U) boundary conditions ✅ pressure (p) boundary conditions for the square-cylinder case.