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.