Steady-Transient External Flow CFD
Budget: ₹600 – ₹1,500 INR
I need a straightforward computational-fluid-dynamics study on an external body. The goal is to analyse how the flow behaves around it, first under steady-state assumptions and then in a full transient run so I can compare averaged results with time-resolved phenomena.
Scope
• Geometry: single external object; I will supply the clean STEP file.
• Physics: mixed laminar–turbulent regime, so the set-up must allow the flow to transition naturally (k-ω SST, k-ε or similar is fine).
• Runs: one steady simulation to reach convergence, followed by a transient simulation with an appropriate time-step and physical time long enough to capture oscillations or shedding.
• Output: pressure and velocity contours, streamlines, force/drag history, and any other field plots that help interpret the results.
Deliverables
1. Solver project files (Ansys Fluent, CFX, OpenFOAM, or comparable mainstream package).
2. Mesh file and mesh statistics.
3. Short PDF memo (2-3 pages) summarising setup, assumptions, residual plots, key findings and screenshots.
4. Raw data for post-processing (CSV or Excel for force coefficients, text files for probes, etc.).
Acceptance criteria
• Residuals below 10-4 for steady run, or stable force plateau.
• CFL and y+ values documented.
• Transient results show at least three shedding cycles (if present) with drag coefficients plotted versus time.
Let me know which solver you plan to use and an estimated turnaround once you review the geometry.
Scope
• Geometry: single external object; I will supply the clean STEP file.
• Physics: mixed laminar–turbulent regime, so the set-up must allow the flow to transition naturally (k-ω SST, k-ε or similar is fine).
• Runs: one steady simulation to reach convergence, followed by a transient simulation with an appropriate time-step and physical time long enough to capture oscillations or shedding.
• Output: pressure and velocity contours, streamlines, force/drag history, and any other field plots that help interpret the results.
Deliverables
1. Solver project files (Ansys Fluent, CFX, OpenFOAM, or comparable mainstream package).
2. Mesh file and mesh statistics.
3. Short PDF memo (2-3 pages) summarising setup, assumptions, residual plots, key findings and screenshots.
4. Raw data for post-processing (CSV or Excel for force coefficients, text files for probes, etc.).
Acceptance criteria
• Residuals below 10-4 for steady run, or stable force plateau.
• CFL and y+ values documented.
• Transient results show at least three shedding cycles (if present) with drag coefficients plotted versus time.
Let me know which solver you plan to use and an estimated turnaround once you review the geometry.