Spiral Tube Heat Exchanger with varying pitch, with ribbed Optimization with grid independence test, report and thesis, graphs

I am completing an M.Tech thesis centred on a spiral-tube heat exchanger and I need a professional design-and-analysis package that I can defend academically. The exchanger must achieve three simultaneous goals: higher heat-transfer efficiency, lower pressure drop, and a compact footprint... (Budget: ₹1500 - ₹12500 INR, Jobs: 3D CAD, CAD/CAM, Engineering, Finite Element Analysis, Mechanical Engineering, Simulation, Thermal Analysis, Thermodynamics)