CFD / Thermal Engineer for BGA Nozzle Optimization

I am building a high-end, custom PCB rework station and have designed proprietary heater heads (nozzles) for BGA component removal and reflow. My goal is to achieve absolutely perfect, even heat exposure across the target component, with zero dead zones or hot spots that could warp the PCB or damage sensitive chips. I am looking for an experienced CFD (Computational Fluid Dynamics) / Thermal Engineer to review my current nozzle CAD designs, simulate the hot gas flow, and make design adjustments to optimize the thermal performance. Your Responsibilities: Review existing CAD: Import our initial 3D models (STEP/IGES) of the rework nozzles. Setup CFD Simulation: Simulate the thermodynamics and fluid mechanics of hot air/nitrogen flowing through the nozzle, hitting a target BGA component and PCB. Analyze Heat Distribution: Identify flow irregularities, turbulent dead zones, or uneven thermal footprints on the target surface. Design Optimization: Modify the internal geometry (e.g., adjusting internal baffles, exit angles, or mesh screens) to achieve a uniform heat distribution. Reporting: Provide a brief report showing the "Before" and "After" flow trajectories, velocity vectors, and temperature gradients. What I Will Provide: 3D CAD files of the initial nozzle designs. Target BGA dimensions and standoff heights. Boundary conditions: Gas inlet temperatures (e.g., 200°C - 240°C), flow rates (L/min), and ambient/bottom-heater conditions. Success criteria (e.g., target $\Delta T$ across the BGA package). Ideal Freelancer Profile: Proven experience in electronics cooling, thermal management, or HVAC/nozzle fluid dynamics. Proficient in industry-standard CFD software (ANSYS Icepak, Flotherm, SolidWorks Flow Simulation, Star-CCM+, or similar). Strong mechanical CAD skills (SolidWorks, Fusion360, or Inventor) to actually implement the necessary baffle/geometry changes. Excellent communication skills and the ability to explain why a geometric change improves the flow. To Apply: Please include a brief overview of your experience with similar fluid dynamics or thermodynamics projects. If you have a portfolio showing velocity vectors or thermal distribution simulations (especially related to nozzles, jets, or electronics), please include a screenshot or link. Start your proposal with the word "Liquidus" so I know you read this full description. Project Type: Fixed Price (or Hourly, let's discuss based on your estimation). Experience Level: Expert