High-Pressure Real-Gas Jet and Throttle Flow as a Simplified Gas Injector Model Using a Discontinuous Galerkin Method

  • Fabian Hempert
  • Sebastian Boblest
  • Malte HoffmannEmail author
  • Philipp Offenhäuser
  • Filip Sadlo
  • Colin W. Glass
  • Claus-Dieter Munz
  • Thomas Ertl
  • Uwe Iben
Conference paper


Industrial devices such as gas injectors for automotive combustion engines operate at ever-increasing pressures and already today reach regimes beyond the ideal-gas approximation. Numerical simulations are an important part of the design process for such components. In this paper, we present a case study with a computational fluid dynamics code based on the discontinuous Galerkin spectral element method with a real-gas equation of state. We assess a high-pressure throttle and jet flow as a basic model of a gas injector. We apply a shock-capturing method to achieve a robust simulation, and a newly developed method to maintain high efficiency despite load imbalances introduced by the shock capturing. The results indicate a dynamic mass flow rate at different pressure ratios between the inlet and outlet.


Mass Flow Rate Pressure Ratio Load Imbalance High Pressure Ratio Lower Pressure Ratio 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



This work is supported by the Federal Ministry of Education and Research (BMBF) within the HPC III project HONK “Industrialization of high-resolution numerical analysis of complex flow phenomena in hydraulic systems”. We also thank the Gauss Centre for Supercomputing (GCS) which provided us with the necessary computing resources on the Hazel Hen.


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Copyright information

© Springer International Publishing AG 2016

Authors and Affiliations

  • Fabian Hempert
    • 3
  • Sebastian Boblest
    • 2
  • Malte Hoffmann
    • 1
    Email author
  • Philipp Offenhäuser
    • 4
  • Filip Sadlo
    • 5
  • Colin W. Glass
    • 4
  • Claus-Dieter Munz
    • 1
  • Thomas Ertl
    • 2
  • Uwe Iben
    • 3
  1. 1.Institute for Aerodynamics and Gas dynamics, University of StuttgartStuttgartGermany
  2. 2.Visualization Research Center, University of StuttgartStuttgartGermany
  3. 3.Robert Bosch GmbH71272 RenningenGermany
  4. 4.High Performance Computing Center, University of Stuttgart70569 StuttgartGermany
  5. 5.Interdisciplinary Center for Scientific Computing, Heidelberg University69120 HeidelbergGermany

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