A key player in the aerospace industry

With 25 years' expertise in numerical simulation and scientific software development, R.Tech has worked alongside the big names in aerospace and established itself as a key player in the sector.

Numerical Simulations

Meshing, CFD, DSMC, thermomechanics, chemistry, plasma, radiations...

Scientific Software

Big Data, machine learning, flight physics, simulators...

Software Distribution

GridPro - Advanced mesh generation software

European Excellence in Aerospace Innovation

R.Tech is an SME specializing in advanced numerical simulations and the development of scientific software.

Recognized in the aerospace sector, it stands out for its expertise in multiphysics mechanics—including fluid mechanics, thermal analysis, thermochemistry, radiation, and materials—as well as in thermal coupling, aerothermodynamics, and space debris.

Since its founding in 2000, R.Tech has placed innovation and scientific rigor at the heart of its projects. Thanks to a team of passionate PhDs, engineers, and developers, it designs numerical simulation tools used by and for the major players in aerospace.

Aerodynamics
Scientific Software
Thermal Analysis
RTech Team

+25

Years of expertise

+50

Clients

+300

Projects

Our Expertise & Activities

Leveraging 25 years of experience, we excel in transforming complex physical phenomena into valuable insights for aerospace innovation.

Trusted by Industry Leaders

We collaborate with leading organizations in aerospace, research, and technology

Airbus
Airbus Defense and Space
Ariane Group
ESA
GMV
ISAE
CNRS
Dassault Aviation
MARIN
ONERA
TATA Steel
Thales
Thales Alenia Space
Von Karman Institute
Airbus
Airbus Defense and Space
Ariane Group
ESA
GMV
ISAE
CNRS
Dassault Aviation
MARIN
ONERA
TATA Steel
Thales
Thales Alenia Space
Von Karman Institute
MODELLING REALITY TO UNDERSTAND IT BETTER... AND PREDICT IT BETTER

MODELLING REALITY TO UNDERSTAND IT BETTER... AND PREDICT IT BETTER

From physics to decision-making. We transform complex phenomena (compressible flows, heat transfers, plasma-material interactions, fragmentation, etc.) into usable data to guide technical and strategic choices in aerospace, industry and research.

RTECH, THE EUROPEAN LEADER IN ATMOSPHERIC RE-ENTRY MODELING OF SPACE DEBRIS

Thanks to its expertise in numerical simulation and development, R.Tech is now the European leader in atmospheric re-entry modeling of space debris. This was recently recognized by CNES with the award of the SME label for expertise and engineering in the field of atmospheric re-entry.

CNES SME Label

CNES SME Label Recognition

Awarded by the French Space Agency (CNES) for excellence in atmospheric re-entry expertise and engineering.

Areas of Excellence

  • 1

    Atmospheric Re-entry

    Expert engineering and modeling for atmospheric re-entry scenarios

  • 2

    Advanced Physics

    Aerothermodynamics and multiphysics simulation expertise

  • 3

    Space Debris

    Comprehensive analysis and mechanical/thermal coupling solutions

European Leadership

As the European leader in space debris modeling and analysis, RTech continues to push the boundaries of what's possible in atmospheric re-entry simulation and space safety.

Research & Development

At RTech, innovation is driven by a commitment to research and development that pushes the boundaries of what's possible in aerospace technology.

R&D at Our Core

Research and development is central to our identity, driving innovation and excellence in all our projects.

50+
Scientific Publications
3
PhD Theses
7000+
R&D Days in 2023

Scientific Publications

Our team has contributed to over 50 scientific publications, advancing knowledge in the fields of aerospace engineering and numerical simulations.

PhD Research

RTech has supported the development of 3 doctoral theses, contributing to academic advancement while generating practical industry applications.

R&D Investment

With over 7,000 R&D days invested in 2023 alone, RTech demonstrates its unwavering commitment to innovation and continuous improvement.

Our Projects

Discover our innovative software solutions that are shaping the future of aerospace technology

News & Events

Stay updated with the latest news, events, and achievements from R.Tech

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Article de conférence

Automatic Shock Based Adaptation of Hexahedral Meshes

5th AIAA International Space Planes and Hypersonic Systems and Technologies Conference, Bengaluru, India

Publié le: 2023-06

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Article de conférence

Reconstruction and Data Exploitation of the AVUM Re-entry Event for Break-up Model Development

2nd International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering (FAR), Heibronn, Germany

Publié le: 2022-06

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Article de conférence

SCARAB4 – Extension of the High-Fidelity Re-Entry Break-Up Simulation Software based on new Measurement Types

2nd International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions & Engineering (FAR), Heibronn, Germany

Publié le: 2021-04

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Article de conférence

CFD based interpolation of drag and heat rates of different objects re- entering the earth atmosphere in a prescribed motion

HiSST: 2nd International Conference on High-Speed Vehicle Science TechnologyAt, Bruges, Belgium

Publié le: 2022-09

International

FAF 2025

18

Mai

Archachon - France

3th International Conference on Flight Vehicles, Aerothermodynamics and Re-entry Missions

R.Tech et GridPro sponsors officiels de FAR 2025, venez découvrir nos dernières réalisation

They're Talking About Us

Discover what media says about RTech and our innovations in aerospace technology

FRANCE3 report on RTech
Published on 10/04/2019

FRANCE3 report on RTech

Discover the portrait of Martin Spel, founder of R-Tech, produced by Ariège Attractivité
Published on 05/01/2022

Discover the portrait of Martin Spel, founder of R-Tech, produced by Ariège Attractivité

LA DEPECHE article on RTech
Published on 25/10/2019

LA DEPECHE article on RTech