Expertise in CFD and External & Internal Aero (Subsonic to Hypersonic Regime). The ideal candidate will have a deep understanding of gas dynamics and shock interactions, aerodynamics, and possess excellent problem solving skills to deliver high-quality simulations for various projects. Function as a solution specialist in the field of Computational Fluid Dynamics using simulation tools such as ANSYS FLUENT, Chemkin or Star CCM+, ANSYS CFX. Key Responsibilities • Perform aerodynamic simulations across subsonic, transonic, supersonic, and hypersonic regimes using CFD tools (e.g., Ansys Fluent) to evaluate external airframe and internal duct/propulsion flow performance. • Analyze complex flow phenomena such as shock formation, expansion waves, separation, and Shockwave–Boundary Layer Interaction, ensuring accurate prediction of pressure, temperature, and heat flux distributions. • Set up and execute CFD models for external flows (wings, fuselage, control surfaces) and internal flows (intakes, nozzles, ducts), applying appropriate boundary conditions, compressibility effects, and gas dynamic principles. • Apply advanced turbulence models — RANS, LES, DES, or hybrid methods — and justify their selection based on flow regime, Reynolds number,and accuracy requirements. • Generate high-quality meshes for complex geometries using structured, unstructured, or hybrid approaches, ensuring proper near-wall resolution (y⁺ control) and grid independence for reliable aerodynamic predictions. • Conduct 6DOF dynamic simulations using dynamic and overset meshes to study vehicle motion, stability, and control behaviour during free-flight or moving-bodyscenarios. • Post-process and analyse CFD results, extracting aerodynamic coefficients (Cl, Cd, Cm), flow visualization plots (Mach contours, Cp distributions), and force/moment data for design evaluation and optimization. • Collaborate with multidisciplinary teams (structures, thermal, propulsion) by providing aerodynamic loads, surface pressures, and heat flux data for coupled simulations and integrated performance analysis. • Automate workflows and data analysis using Python or scripting tools for mesh generation, solver execution, and result processing to improve efficiency and repeatability. • Document and communicate findings through detailed technical reports, validation studies, and design recommendations to support airframe, propulsion, and system-level development efforts Requirements Required Skills: • Perform aerodynamic simulations across subsonic to hypersonic flow regimes. • Analyze external flows over airframes and internal flows through ducts, intakes, and propulsion systems. • Knowledge of Shockwave Boundary Layer Interaction and Gas Dynamics. • Experience with turbulence modeling (RANS, LES, DES) and mesh generation for complex geometries. • Perform 6DOF Simulations with Dynamic and Overset Mesh. • Knowledge of External & Internal Aero (Subsonic to Hypersonic Regime) Modelling– mandatory. • Strong fundamentals in CFD with Ansys Chemkin knowledge- Preferred. • Aerospace (or) Mechanical with strong knowledge on Combustion simulations. • Knowledge of gas dynamics and shock interactions mandatory • Knowledge of external aerodynamics– mandatory • Basic knowledge of MATLAB for post-processing. Preferred Skills: • Fluent dynamic and overset meshing • Fluent 6DOF UDFs • Fluent external aero best practice • Pressure based and density-based solver’s applicability along with pros & cons. • Low subsonic to hyper-sonic flows. Most of the work is in 0.9 to 5 Mach • Adaptive meshing o Job submission on cluster(Pbs scripts) & RSM • TUI journal utilization for automation of work • Parametric optimization through OptiSLang. Parameterization through space claim and fluent for simultaneous design point runs. • Experience with ANSYS FLUENT/ STAR CCM+ or other commercial CFD software. • Sound background in Combustion, Computational Fluid Dynamics [CFD], Aerodynamics, & Aerothermodynamics, Scramjet Engine CFD Modelling, Propulsion, Liquid Propellant Rocket Engine Physics. • Engaging personality, engineering curiosity and willingness for continuous learning. • Possesses a sense of urgency, strong organizational and follow up skills.