Numerical Simulation Engineer

Expleo Group; Herstal; Hybrid; EUR 55,000 - 85,000; Full time

Benefits offered by this job

Flexible homeworking

32 vacation days

Health insurance

Pension plan

Meal vouchers

Training opportunities

Job summary

Expleo Group in Belgium is seeking a CFD Engineer to advance fluid dynamics simulations across aerospace and mechanical systems. You will model flows, run multi-physics analyses, and push innovative solutions in collaboration with design and testing teams.

You'll apply OpenFOAM, ANSYS Fluent/CFX, and STAR-CCM+ alongside Python scripting to automate workflows on HPC clusters, contributing to robust product development and validated results.

Qualifications

• Master’s or Engineering Degree in Fluid Mechanics, Aeronautics, Aerospace Engineering, Mechanical Engineering, or Applied Physics.
• 3–5 years in numerical CFD simulation in an industrial or academic environment (internships included).
• Experience in multi-physics or FEM (fluid-structure interaction, thermal-mechanical coupling) is a strong plus.
• Familiarity with aerospace/defense standards (e.g., DO-160, MIL-STD) is appreciated.
• Proficiency in at least one CFD software (OpenFOAM, ANSYS Fluent/CFX, STAR-CCM+).
• Knowledge of turbulence models (RANS, LES, DES), numerical methods (FVM, FEM), and meshing tools (ICEM CFD, Pointwise, snappyHexMesh).
• Scripting (Python, Bash) for pre/post-processing (e.g., Paraview, Tecplot, matplotlib).
• Knowledge of High-Performance Computing (HPC) and Linux/cluster environments.

Responsibilities

• Model and analyze fluid flows (compressible/incompressible, turbulent, multiphase) for critical applications (aerodynamics, propulsion, thermal management).
• Couple physical phenomena using tools like ANSYS Multiphysics, COMSOL, or internal codes.
• Perform finite element analysis (FEM) to assess structural integrity, stress, deformation, and fatigue in mechanical components.
• Develop reduced-order models (ROM) or hybrid methods to optimize system performance.
• Collaborate with R&D, design, testing, and customer teams; prepare technical reports and presentations.

Education

Master’s or Engineering Degree in Fluid Mechanics, Aeronautics, Aerospace Engineering, Mechanical Engineering, or Applied Physics

Tools

OpenFOAM

ANSYS Fluent/CFX

STAR-CCM+

Job description

Expleo is a trusted partner for your innovation journey. As a global engineering, technology and consulting service provider, we are ideally positioned to help you achieve your ambitions and future-proof your business. With a smart blend of bold thinking and reliable execution, we're able to fast-track innovation through each step of your value chain.

We are strategically positioned to build value, with a global footprint across 30 countries. We are as global and local as you need us to be, with strong best-in-class pan-European technological centers and unique best-shoring capabilities.

We leverage a network of high value-adding affiliates in consulting and industrial excellence, and leading partners across multiple sectors to provide you with the most comprehensive services and solutions in an ever-changing environment.

Responsibilities

CFD Simulation:

• Model and analyze fluid flows (compressible/incompressible, turbulent, multiphase) for critical applications (aerodynamics, propulsion, thermal management, etc.).
• Use industry-standard tools such as OpenFOAM, ANSYS Fluent/CFX, STAR-CCM+, or in house codes.
• Validate results through comparison with experimental or analytical data.

Multi-Physics & FEM:

• Couple physical phenomena (e.g., fluid-structure interaction, thermal-mechanical, aeroacoustics) using tools like ANSYS Multiphysics, COMSOL, or internal codes.
• Perform finite element analysis (FEM) to assess structural integrity, stress, deformation, and fatigue in mechanical components interacting with fluid flows.
• Use ANSYS Mechanical, Creo Simulate or similar for static/dynamic structural analyses.
• Develop reduced-order models (ROM) or hybrid methods to optimize system performance.

Optimization & Innovation:

• Contribute to the improvement of simulation tools (automation, Python scripting, HPC).
• Propose innovative solutions to address technical challenges (e.g., drag reduction, thermal management).
• Collaborate with data science teams to integrate AI/ML approaches into simulation workflows.

Collaboration & Reporting:

• Work closely with R&D (Research & Development), design, testing, and customer teams.
• Prepare technical reports, presentations, and specifications for project reviews.
• Support wind tunnel or laboratory tests to correlate simulation and experimental data.

Qualifications

• Master’s or Engineering Degree in Fluid Mechanics, Aeronautics, Aerospace Engineering, Mechanical Engineering, or Applied Physics.
• 3 to 5 years in numerical simulation (CFD focus) in an industrial or academic environment (internships included).
• Experience in multi-physics or FEM (fluid-structure interaction, thermal-mechanical coupling, etc.) is a strong plus.
• Familiarity with aerospace/defense standards (e.g., DO-160, MIL-STD) is appreciated.
• Proficiency in at least one CFD software (OpenFOAM, ANSYS Fluent/CFX, STAR-CCM+).
• Knowledge of turbulence models (RANS, LES, DES), numerical methods (FVM, FEM), and meshing tools (ICEM CFD, Pointwise, snappyHexMesh).
• Scripting (Python, Bash) for pre/post-processing (e.g., Paraview, Tecplot, matplotlib).
• Knowledge of High-Performance Computing (HPC) and Linux/cluster environments.

Benefits

Expleo, we are committed to providing a competitive salary and substantial benefits offering with unique wellbeing, financial and employee recognition programs.

We pride ourselves on our diverse and inclusive culture and offer a variety of family-friendly policies and enhanced leave to help you achieve a healthy work life balance.

By providing significant learning and development opportunities, we encourage individual growth and success throughout your career with us.

• Collaborative working environment – we stand shoulder to shoulder with our clients and our peers through good times and challenges
• We empower all passionate technology-loving professionals by allowing them to expand their skills and take part in inspiring projects
• Expleo Academy - enables you to acquire and develop the right skills by delivering a suite of accredited training courses
• Enjoy a comprehensive benefits package, including hospitalization and outpatient insurance, a pension and group insurance plan, employee wellbeing initiatives, sports and social events, gifts for special occasions, and much more!
• Enjoy meal and eco vouchers to support your daily needs and sustainable purchases
• Receive monthly representation fees to support work-related expenses
• 32 vacation days (20 + 12 for a 40-hour week).
• Always working as one team, our people are not afraid to think big and question the status quo.
• Flexible homeworking policy – Balance your career and personal life

Our Commitment to Diversity

We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age