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.

Created: 2026-03-04