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I have already built and run a three-ramp scramjet inlet with an isolator in ANSYS Fluent for a freestream Mach of 6.8 at 300 K. The geometry and test conditions follow the reference study you will find here: https://www.mediafire.com/file/114w1th29a8pqyf/Impact+of+wall+cooling+on+the+stability+and+aerothermodynamic+performance+of+a+scramjet+[login to view URL] Although the solution reaches convergence, the peak coefficient of pressure is roughly 30 % lower than the paper reports, and the mass-flow prediction drifts in the same range. I am using the density-based solver, ideal-gas properties, and the SST-Transition turbulence model; wall cooling is included exactly as described in the article. Mesh quality looks acceptable on standard checks, yet the mismatch persists. What I need from you is a focused second look at the entire setup—boundary conditions, mesh strategy, turbulence and energy settings, viscous heating, wall-function treatment, and any discretisation or solver parameters that could explain the deviation. A brief, well-reasoned memo or annotated case file that brings my results to within ±5 % of the published Cp peak . Also I have to study the inlet unstart phenomenon so different back pressure cases with results are also required. If you prefer to start from scratch with your own grid or recommend OpenFOAM cross-checks, that is fine, but the final answer must still run in Fluent. Please let me know what additional files you require and how long you expect the troubleshooting and validation cycle to take so we can lock the milestones.
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Dear Client, As an Aerospace Engineer specializing in Mach 5+ shock-wave/boundary-layer interactions (SWBLI), density-based solvers, and scramjet inlet unstart dynamics, I am well prepared to resolve your 30% peak C_p discrepancy and execute your unstart study in ANSYS Fluent. At Mach 6.8 with cold-wall cooling, a 30% underprediction in peak C_p and mass flow typically arises from: Turbulence Over-Dissipation: SST-Transition overpredicting eddy viscosity at oblique shock impingements without compressibility corrections (Sarkar/Zeman). Near-Wall Treatment & Viscous Heating: Insufficient y+ < 0.5 inflation or missing viscous dissipation/total energy terms under steep wall temperature gradients (T_w/T_0). Numerics & Flux Discretization: Excessive numerical diffusion; switching to AUSM+ or Roe-FDS with 2nd-order MUSCL/limiters sharply captures oblique shock angles and pressure peaks. Scope & Deliverables Audit & C_p Calibration: Tuning boundary conditions, mesh refinement, and solver numerics to match published C_p curves within +- 5%. Inlet Unstart Parametric Study: Simulating back-pressure ratio sweeps at the isolator exit to capture shock-train forward propagation, unstart margins, and mass spillage. Deliverables: Annotated Fluent case/data files (.[login to view URL]), mesh files, and an engineering report with schlieren/Mach contours and validation plots. Required Files: Existing .[login to view URL] setup and .msh file. Timeline: 4 to 6 business days. Best regards, Batuhan Akkova
₹15,000 INR in 6 days
2.2
2.2
13 freelancers are bidding on average ₹9,680 INR for this job

Hi The key challenge in hypersonic scramjet inlet CFD is accurately capturing shock waves, shock–boundary-layer interaction, separation, and inlet compression while maintaining mesh and solver independence. I can help validate your ANSYS Fluent results against the reference/experimental data and identify discrepancies. I have experience with compressible CFD, ANSYS Fluent, density-based solvers, turbulence modelling, mesh-independence studies, and validation of high-speed flows. For scramjet inlets, I can evaluate Mach/pressure contours, shock locations, wall-pressure distribution, separation regions, and key inlet performance parameters. Published scramjet studies also emphasize grid convergence and correct treatment of shock–boundary-layer interaction for reliable validation. I can review your existing model/setup, correct the CFD methodology where required, run validation cases, and prepare clear comparison plots and conclusions. Could you share the reference paper/experimental data and your current Fluent case files so I can check the setup and validation methodology? Best regards, Arati M.
₹7,000 INR in 7 days
6.7
6.7

Hi, Your case is exactly the kind of CFD troubleshooting I work with: compressible high-speed flow, shock interaction, wall cooling, turbulence modelling, mesh sensitivity, and Fluent validation against published data. The final delivery can include the corrected Fluent case and data files together with a short technical memo explaining what caused the mismatch, what was changed, and how the final Cp and mass-flow results compare with the reference study. My target will be to reproduce the published Cp peak as closely as the available geometry and paper data allow, with the requested plus or minus 5 percent range used as the validation objective rather than an artificial numerical guarantee. I can complete the troubleshooting and validation cycle in about 5 to 7 days. Best regards, Mahmoudreza
₹11,500 INR in 6 days
4.7
4.7

I have conducted various projects (students+industry). With genuine company (vyadh Aerospace) where I am a core member . I provide student Friendly Rates for the service . Depending on project work . I am even comfortable for price negotiation depending on work more or less . Else for other information you can contact me directly .
₹6,500 INR in 7 days
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Hi, I have hands-on experience with ANSYS Fluent and CFD setup/post-processing, and I would be interested in taking a systematic second look at your scramjet inlet case. Rather than changing parameters arbitrarily, I would work through the setup step-by-step and compare it against the methodology and reference results from the supplied paper. I would specifically check the boundary conditions, reference values and Cp calculation, mesh resolution and near-wall treatment, turbulence/transition model settings, energy and thermal boundary conditions, viscous heating, density-based solver settings, discretisation schemes and convergence behaviour. Since your case is already converging but is showing a significant difference in peak Cp and mass flow, I would also look at whether the discrepancy is caused by the definition/reference location of the reported quantities rather than convergence alone. If necessary, I can recommend targeted mesh or solver sensitivity checks instead of rebuilding everything unnecessarily. Please provide the Fluent case/data files, mesh, journal/settings file if available, and the relevant figures/results from the paper. I can then identify the most likely sources of the discrepancy and document the changes and validation results clearly. I can start immediately and aim to complete the initial diagnostic within 5 days.
₹7,500 INR in 5 days
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I am Shalu Yadav, recently completed Bachelors of Technology in Aerospace Engineering (2022-2026) and have gained industrial experience in Propulsion engineering through my 9 months internship as Jr Propulsion Engineer at Omspace Rocket & Exploration Pvt. Ltd. During my internship, I worked on designing a cryogenic rocket engine with a regenerative cooling system, propulsion testing system such as pressure-fed system and cold flow system. My work in R&D involved engineering designing and analysis, system-level understanding, technical documentation, and testing activities. In addition, I have actively participated in multiple aerospace projects and competitions involving sounding rockets, UAVs, CubeSats, and CanSats, which leads me to won best design award in InSPACE Model Rocketry competition 2024-25, first prize in AIU Anveshan 2024-25, and so more. I have learned a few engineering tools such as ANSYS, Solidworks, Creo, fusion, AutoCAD, NASA CEA, and RPA. I am highly motivated to contribute my technical knowledge and enthusiasm to the innovative projects.
₹12,500 INR in 7 days
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Hello I can bring your ANSYS Fluent scramjet inlet results to within the required pm 5% of the reference paper's. A 30% underprediction in peak pressure and drifting mass flow at Mach 6.8 typically stems from numerical dissipation at sharp shock intersections or an incorrectly resolved shock-wave/boundary-layer interaction (SWBLI) heavily influenced by wall cooling.
₹7,000 INR in 7 days
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Hi, Thanks for outlining the issue so clearly. Hypersonic inlet simulations at Mach 6.8 are notoriously tricky, especially when it comes to capturing shock-wave/boundary-layer interactions and accurate peak C_p values. A 30% drop usually points to subtle issues in boundary layer resolution, wall y^+, viscous heating, or how the flux scheme handles shock interactions. I can take a close look at your setup and get your results aligned with the paper within the required ±5% margin. To get started, please share: The CAD file in STEP format and the original reference paper. Your current mesh file (.msh). Your Fluent case and data files (.cas / .dat). Proposed Timeline & Deliverables: Days 1–2: Complete audit of your mesh quality, wall y^+, boundary settings, and solver discretization schemes. Days 3–4: Mesh adaptation, solver tuning (viscous heating, energy, turbulence terms), and test runs. Day 5: Final validation run, delivery of the updated Fluent case file (.cas), and a brief technical memo explaining the adjustments alongside comparative C_p plots. Estimated time: 4 to 5 days. Let me know once you upload the files, and we can finalize the milestones and get to work right away. Best regards,
₹14,337 INR in 4 days
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₹12500-37500 INR
₹1500-12500 INR
$250-750 USD
$2-8 USD / hour
₹12500-37500 INR
€100-200 EUR
₹12500-37500 INR
$2-8 USD / hour
₹1500-12500 INR
€100-200 EUR
₹1500-12500 INR
$250-750 USD