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Senior CFD Engineer - Powertrain
$98,500 - 123,100
Rivian
North Haggerty Road 13250, Plymouth
$98,500 - 123,100
Requirements
Must:
- Bachelors degree in Mechanical Engineering, Aerospace Engineering, Automotive Engineering, or a related discipline required.
- Masters degree or Ph.D. focusing on fluid mechanics, heat transfer, or CFD is highly preferred.
- At least 5 years of relevant experience in CFD and 1D thermal analysis within automotive, aerospace, energy, or similar sectors (advanced degrees may substitute for experience).
- Demonstrated proficiency in 1D and CFD pre-processing, solving, and post-processing using tools like Simerics, Star-CCM+, or equivalents.
- Experience with Simerics-MP+ for simulating oil splash in rotating machinery and gear systems is advantageous.
- Solid understanding of multiphase turbulence physics, fluid dynamics, and heat transfer (including VOF, surface tension, aeration, conduction, convection, radiation, conjugate heat transfer, and turbulence modeling) with strong insight into tribology.
- Competence in managing complex moving geometries through sliding mesh, overset mesh, or morphing techniques for components like gears and bearings.
- Familiarity with system-level simulations for Drive Units or similar components, including flow and thermal management.
- Knowledge of duty cycles and durability concepts (e.g., oil pump operations, thermal cycling, life prediction based on SN or temperature-time exposure) is a plus.
- Proficiency in parametric CAD tools and geometry manipulation (CATIA or similar) sufficient for preparing CFD-ready models.
- Experience with scripting in Python, MATLAB, or similar for automating processes, reducing data, and conducting parametric analyses.
- Ability to operate independently while flourishing in a highly collaborative team setting, managing analysis tasks autonomously with minimal oversight.
- Excellent communication skills to convey complex CFD and thermal insights to non-specialists and actionable guidance for design teams.
- A proactive attitude towards exploring new tools, methods, and strategies to enhance the precision, speed, and reliability of analytical processes.
Responsibilities
- As the senior CFD simulations specialist, you will assist in the design and optimization of lubrication and cooling performance for powertrain Drive Unit assemblies, including e-motors.
- Develop, validate, and sustain 3D CFD models (both steady-state and transient) utilizing industry-standard software (e.g., Simerics, Star-CCM+ or similar) to forecast oil splash, pressure drop, heat transfer, and flow distribution in critical systems.
- Create, validate, and maintain 1D lubrication models (steady-state and transient) using industry-standard software (e.g., AMESIM, GT Suite, Matlab, or similar) to predict lubrication patterns, losses, aeration effects, and other parameters.
- Establish boundary conditions, load cases, and duty cycles based on vehicle usage profiles and testing data to ensure simulations accurately reflect real-world customer applications and extreme environmental scenarios.
- Convert simulation findings into actionable design suggestions for component owners (Driveline, powertrain, Motor), including geometry modifications, duct strategies, and insulation concepts.
- Collaborate with designers and system engineers to harmonize lubrication, thermal, NVH, durability, and manufacturability requirements within a cross-functional framework.
- Develop and enhance correlations between CFD and physical testing, including formulating testing plans, instrumentation requirements, and success criteria for lubrication and thermal validation at various levels.
- Assist in root cause investigations on developmental and field issues where lubrication and thermal performance may be involved; recommend data-driven corrective measures and design enhancements.
- Support the creation and standardization of CFD methodologies, best practices, and templates (for meshing strategies, model reduction techniques, and post-processing standards) to hasten analysis cycles and improve quality.
- Present intricate analysis outcomes through concise reports and presentations tailored for design engineers, leadership, and cross-functional collaborators.
Description
At Rivian, we strive to inspire adventurous spirits and foster ingenuity in the world of electric vehicles. Our diverse team shares a passion for the outdoors and a commitment to environmental stewardship. We offer comprehensive benefits including robust medical, dental, and vision insurance for full-time employees and their families, effective from day one of employment. Our workplace values inclusivity and collaboration, and we are committed to supporting each team members growth in a dynamic and innovative environment.
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