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Julien J.JJ

Julien J.

CFD & Thermal Engineer

€355/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Julien

👨‍💻 Mechanical Engineering Graduate with 8 years of experience, passionate about innovation and solving complex fluid mechanics and thermal challenges. I enjoy collaborating with laboratories and R&D centers to design efficient and creative technological solutions. Curious and always learning, I continuously train myself to push my skills and keep innovating.

đź’ˇDeveloping a new product and facing technical challenges?

Whether forpumps, cooling circuitsor aerodynamic issues, I will support you at every stage:

- **Preliminary design & pre-sizing**: transforming your ideas into concrete solutions.
- **Design & simulation**: validating your technical choices through numerical modeling.
- **Optimization & innovation**: improving energy performance and reducing costs.

👉 My role: saving you time, securing your developments, and maximizing the value of your innovations.

đź“© **Contact me to present your project and explore the technical and collaboration possibilities together. It's non-binding and could be the starting point for great progress.



**Check out my portfolio:
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 50km)

Experience

  • VALEO POWERTRAIN – CRÉTEIL R&D CENTER
    Thermal Simulation Engineer
    January 2019 - August 2022 (3 years and 7 months)
    Worked on fluid and thermal engineering of electrical systems for automotive electrification (air/water/oil cooled machines, inverters).
    • Developed and validated new simulation methodologies using SPH tools (Smoothed Particle Hydrodynamics) for oil-cooled machines.
    • Ensured model calibration and simulation-test correlation.
    • Authored and validated technical reports.
    • Participated in internal/external communication: conferences, technical proposals.
    • Performed technological watch and IP monitoring.
  • VALEO POWERTRAIN EU – CERGY R&D CENTER
    Simulation Design Leader
    September 2022 - Today (3 years and 9 months)
    I am responsible for the Simulation Team, working on all Mechanical challenges:
    • Structural
    • Vibrations
    • Thermal
    • Support ~5 mechanical development projects from concept to production.
    • Continuously improve simulation methodologies to correlate with test data.
    • Coordinate 2 local colleagues and manage a team of 10–15 offshore engineers (in China & India).
    Thermal Analysis
  • VEDECOM – Versailles
    Very-Low-Energy Auxiliaries and Energy Management
    September 2017 - December 2018 (1 year and 3 months)
    • Objective: Reduce driving range uncertainty and HVAC energy overconsumption while improving passenger comfort.
    • Built a numerical simulation platform (FEA, CFD, 1D) to guide innovations and support the electric/hybrid vehicle sector.
    Fluent Thermal Analysis

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Education

  • 3-YEAR
    ENSEM NANCY FRANCE UNIVERSITY OF LORRAINE
    2016
    3-YEAR
  • ERASMUS ABROAD SEMESTER Polytechnic University of Bucharest

Skill set

Categories