I’m preparing an optimisation study that compares twenty different 2-D axisymmetric geometries ( similar in shape) in Ansys Fluent 2024. Each case carries super-critical CO₂ and the sole goal is to improve overall thermal performance by maximising the heat-transfer rate, so mesh quality and consistency across all variants are critical. You will create fully structured grids that import straight into Fluent 2024 without any conversion. Geometries in .iges format will be given. Please keep boundary zone names identical from case to case so I can automate the solver runs later. A smooth growth ratio near the walls is essential; I’m targeting y⁺ well below 1 because the flow will be modelled with low-Re turbulence options. Deliverables • Twenty *.msh files, one per geometry, ready for Fluent 2024 • A brief text report that lists cell count, minimum orthogonality, maximum aspect ratio, and confirms y⁺ targets for each model • Screenshots of the mesh on a mid-plane so I can do a quick visual scan Acceptance criteria • All files open in Fluent 2024 with zero errors or negative volumes • Structured blocking everywhere; no unstructured islands or skewed wedges • Minimum orthogonality ≥ 0.15 and maximum aspect ratio ≤ 100 (unless a sharp-edge feature forces a local exception and we agree beforehand) • Identical zone naming across all twenty meshes If you have experience meshing CO₂ heat-transfer devices or running optimisation loops, mention it when you send a note; otherwise, showing a sample of a past structured grid is enough to get started.