OpenFOAM Chapter 4 (Section 4): blockMeshDict Boundaries — inlet/outlet, wall, symmetry, empty скачать в хорошем качестве

OpenFOAM Chapter 4 (Section 4): blockMeshDict Boundaries — inlet/outlet, wall, symmetry, empty

In OpenFOAM Chapter 4 — Section 4, we continue building blockMeshDict and focus on one of the most critical parts of meshing: ✅ Defining boundary patches (boundaries) correctly. At this stage, we tell OpenFOAM exactly: which faces belong to each boundary, what the boundary name is, and what the boundary type is. What we define in this section 1) Inlet (velocity inlet) Name: inlet Type: ✅ patch The inlet spans multiple blocks, so it’s built from multiple faces Face ordering must follow the right-hand rule so normals point out of the domain 2) Outlet (right boundary) Name: outlet Type: ✅ patch Also spans multiple blocks → multiple faces Use the extrusion mapping: ✅ corresponding point = point + 16 3) Square cylinder boundary (solid obstacle) Name: square / squareCylinder Type: ✅ wall Built from 4 faces (4 sides of the square) Face normals must point out of the fluid region 4) Top and bottom boundaries In this case we prefer symmetry: symmTop → ✅ symmetryPlane symmBottom → ✅ symmetryPlane Each is made from multiple faces across blocks (again: right-hand rule) 5) Front and back (2D case) Name: frontAndBack Type: ✅ empty Collect all faces on: z = 0 plane (front) extruded plane (back) Next section In Section 5, we run: ✅ blockMesh and generate the mesh for the square-cylinder domain.