Simulation Engineer - CFD (Aerodynamic )

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.

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