CFD Analyst

About the role

The Role

At Valar Atomics, we are seeking a Computational Fluid Dynamics (CFD) Analyst to lead advanced fluid flow and thermal simulation efforts for next-generation nuclear systems. In this role, you will develop high-fidelity CFD models that support reactor design optimization, system performance evaluation, and safety analysis. You will work closely with engineering teams to solve complex thermal-fluid challenges, validate analytical methods, and help advance innovative nuclear technologies from concept through deployment.

Key Responsibilities

• Develop and validate CFD models for nuclear reactor systems, including thermal-hydraulic and fluid dynamics simulations using tools such as ANSYS Fluent (Preferred).
• Perform geometry pre-processing, mesh generation, turbulence modeling, and multiphase flow analysis to ensure accurate representation of complex physical phenomena.
• Integrate CFD results with experimental data and system-level models to improve predictive accuracy and reliability.
• Leverage AWS or other cloud platforms for large-scale simulations and computationally intensive analyses.
• Collaborate with cross-functional teams to define CFD requirements and incorporate insights into design and testing processes.
• Prepare and present technical reports and visualizations to stakeholders, clearly communicating simulation results and recommendations.

You Will Be Successful in This Role If

• Apply strong technical expertise in fluid dynamics, heat transfer, and simulation methods to solve complex engineering problems.
• Develop accurate, high-quality CFD models that provide actionable insights for design improvements and performance optimization.
• Collaborate effectively with mechanical, nuclear, and systems engineers to integrate simulation results into real-world hardware development.
• Communicate complex findings clearly through concise reports, visualizations, and technical recommendations.
• Demonstrate curiosity and ownership by exploring innovative modeling approaches, validating assumptions, and continuously improving analysis methods.

Basic Qualifications

• Bachelor's or Master's Degree in Mechanical Engineering, Nuclear Engineering, Aerospace Engineering, or a related field.
• 3+ years of experience in CFD modeling and simulation, preferably in the energy or nuclear sector.
• Proficiency in ANSYS Fluent (Preferred) or similar CFD tools.
• Solid understanding of heat transfer, fluid mechanics, and numerical methods.
• Experience in performing thermal-fluid analysis, turbulence modeling, and simulation optimization.
• Able to work independently and as part of a multidisciplinary team.

Preferred Skills and Experience

• Experience with cloud-based simulation workflows (e.g., AWS).
• Familiarity with model-based systems engineering (MBSE) principles.
• Knowledge of nuclear industry safety protocols and regulatory requirements.
• Previous experience in the nuclear industry and familiarity with High Temperature Gas Cooled Reactors (HTGRs).
• Experience with multi-physics simulations (for example conjugate heat transfer, radiation, or fluid–structure interaction) is advantageous.