CFD/Aftertreatment Engineer

Job Title: CFD/Aftertreatment Engineer - MATLAB/ Simulink
Location: Onsite - Columbus, IN
Job Description:
We are seeking a skilled and motivated MATLAB/Simulink and CFD Engineer to support the development and simulation of diesel exhaust after-treatment systems. This role will be primarily onsite in Columbus, IN , with collaboration across global engineering teams and external catalyst suppliers.
The ideal candidate will bring strong expertise in MATLAB/Simulink modeling, thermal-fluid sciences, and computational fluid dynamics (CFD), with an emphasis on catalyst modeling and system simulation of components such as DOC, DPF, SCR, and NASD .
Key Responsibilities:
MATLAB / Simulink Focus:

• Develop, calibrate, and validate aftertreatment component models (DOC, DPF, SCR, NASD) using engine test data or synthetic data.
• Create complete system-level models and support simulation via MATLAB Simulink .
• Develop and utilize S-functions , FMU models , and automation tools for simulation and post-processing.
• Conduct model validation and calibration development using ECU/ECM data.
• Support Hardware-in-the-Loop (HiL) and Software-in-the-Loop (SiL) applications for early-stage control software validation.
• Use AVL Cruise M as the primary simulation tool for system-level modeling and performance evaluation.

Catalyst Modeling:

• Work with internally developed and supplier-provided catalyst models.
• Evaluate and enhance model accuracy and robustness.
• Develop user-friendly analytical tools in MATLAB for use by internal engineering teams.

Cross-functional Collaboration:

• Work closely with product business units (BUs), calibration engineers, and catalyst suppliers to support integration and validation efforts.
• Improve existing modeling processes and simulation workflows.

CFD Requirements (Secondary/Optional Role Support):
Tool Utilization:

• CAD Cleanup / Meshing: Ansys Workbench, SpaceClaim, ICEM (Hex/Tetra), Fluent Meshing, ANSA, STAR-CCM+
• Solvers: Ansys Fluent, Ansys CFX, STAR-CCM+
• Post-Processing: Ansys CFD Post, Fluent, STAR-CCM+

Domain Areas:

• Automotive and industrial exhaust after-treatment systems
• Under-hood and exhaust filter thermal simulation
• Combustion, cooling jacket, and rotor-stator heat transfer analysis
• HVAC and data center airflow analysis
• Electronic component cooling, oil-water-gas separation, and power plant systems

Technical CFD Areas:

• Steady/Transient state simulation
• Conjugate heat transfer (CHT)
• Multiphase and multispecies transport
• Particle tracking simulations

Required Qualifications:

• Bachelor's or Master's in Mechanical, Automotive, Chemical, or related Engineering discipline.
• Minimum 5 years of hands-on experience in MATLAB and Simulink for system modeling and simulation.
• Academic or professional experience in chemical reaction kinetics , catalysis , or heat/mass transfer is preferred.
• Exposure to engine control modules (ECMs/ECUs) and aftertreatment calibration workflows .
• Strong analytical and communication skills.

Nice to Have:

• Experience with AVL Cruise M (training can be provided).
• CFD simulation experience (using Ansys, STAR-CCM+).
• Background in automotive exhaust systems , fluid-thermal systems , or powertrain modeling .