Simulation & Consulting

for Steam Sterilization Processes

Validated simulation models – built on 5 years of focused PhD research

About

I am Simon Pletzer, PhD (cand.), specializing in steam sterilization and computational fluid dynamics (CFD). Over the past 5 years, I have conducted in-depth research on steam penetration and sterilization cycle optimization. My work bridges science and industry, helping companies better understand and optimize their sterilization challenges.

Services

    • Steam penetration analysis in medical devices
      Assessment of how effectively steam reaches all parts of complex geometries and loads.

    • Investigation of sterilizer chamber designs
      Flow field, steam distribution, load positioning, and thermal behavior.

    • Sterilization cycle optimization & troubleshooting
      Identifying critical process parameters, eliminating weak points, and improving robustness.

    • Early-stage design integration
      Applying CFD already during concept development to avoid costly redesigns later.

    • Chamber and tray development
      Optimizing geometry for efficient steam flow and penetration.

    • Hydraulic components
      Steam generators, vacuum pumps, and condensers designed for stable and reliable operation.

    • Medical devices
      Support in designing instruments that allow for better steam penetration and sterility assurance.

    • Scientific literature analysis
      Reviewing and translating scientific findings into practical guidance for sterilization processes.

    • Design of experiments & result interpretation
      Supporting experimental setups and providing deeper insights into outcomes.

    • Process optimization advice
      Identifying savings potential and increasing process robustness.

Why Computational Fluid Dynamics?

  • Reduce costs by minimizing physical test cycles

  • Accelerate development timelines with virtual simulations

  • Gain unique insights into steam pentration processes in medical devices

  • Optimize chamber and tray designs before manufacturing

  • Backed by 5 years of dedicated PhD research in steam sterilization

Publications

Peer-Reviewed Articles

Conference Presentations

  • S. Pletzer, B. Lang, A. Bergmann, and C. Hochenauer (2025).
    Experimental and numerical determination of the steam amount inside long, fine cavities using absorption spectroscopy and computational fluid dynamics. A combined study using wavelength modulation spectroscopy and CFD.
    Presentation at the 26th WFHSS Congress, Hong Kong, China

  • S. Pletzer, M. Miranda, M. Magno, and C. Hochenauer (2025).
    Einfluss der Ladungspositionierung während eines Wasserdampfsterilisationszyklus: Eine experimentelle und numerische Studie
    Presentation at the 28th DGSV Congress, Kassel, Deutschland

  • S. Pletzer, M. Miranda, M. Magno, and C. Hochenauer (2024).
    Influence of the load positioning during a steam sterilization cycle: An experimental and numerical study.
    Presentation at the 25th WFHSS Congress, Santiago, Chile