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Models and Computational Methods for Rarefied Flows - RTO

Monday 24 January 2011 - Friday 28 January 2011

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From January 24 to 28, 2011

von Karman Institute, Rhode-St-Genèse, Belgium


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Rarefied gas effects are encountered in a variety of flow applications ranging from hypersonic flights at high altitude, ballute entry and descent during planetary missions, station-keeping and orbit transfer of satellites, to micro-scale gas flows, such as in Micro-Electro-Mechanical Systems (MEMS). The conventional fluid dynamics Navier-Stokes equations, based on a continuum assumption, fail to describe accurately rarefied gas effects. They can be investigated at microscopic level by means of stochastic methods, such as Direct Simulation Monte Carlo (DSMC), as well as by means of deterministic solvers for the Boltzmann equation. Macroscopic transport equations have also been developed based on moments of the Boltzmann equation for the transition between the rarefied and continuum regimes.

The objective of this series is to review the up-to-date physico-chemical models and numerical simulation strategies that describe rarefied gas effects in flows in the transition and rarefied regimes, including relevant aerospace applications.

After an introduction to rarefied gas effects in hypersonic applications, the first lectures will focus on the physico-chemical models and computational methods for kinetic equations and Boltzmann moment systems. Then, a session devoted to experimental data will be followed by applications in hypersonics and electric propulsion. The directors of this series are Prof. T. Magin, von Karman Institute for Fluid Dynamics, and Prof. M. Torrilhon, RWTH Aachen University.


Monday 24 January 2011

  • 09.00 Welcome address
    Mr. J. Muylaert, Director, von Karman Institute for Fluid Dynamics
  • 09.15 Review of rarefied gas effects in hypersonic applications
    Mr. E. Josyula, , Air Force Research Laboratory (USA)
  • 11.00 Surprising hydrodynamic results discovered by means of Direct Simulation Monte Carlo
    Prof. A. Garcia, San Jose State University (USA)
  • 14.00 Kinetic models for rarefied gases
    Prof. A. Frezzotti, Politecnico di Milano (Italy)
  • 15.45 Internal energy excitation and chemical reaction models for rarefied gases
    Dr. D. Bruno, Institute of Inorganic Methodologies and Plasmas - CNR (Italy)

Tuesday 25 January 2011

  • 09.00 Direct Simulation Monte Carlo: theory, methods, and open challenges
    Prof. A. Garcia
  • 10.45 Hybrid particle-continuum numerical methods for aerospace applications
    Prof. I. Boyd, University of Michigan (USA)
  • 14.00 Solving the Boltzmann Equation on GPU
    Prof. A. Frezzotti
  • 15.45 High-order numerical methods for the space non-homogeneous Boltzmann equation
    Prof. G. Russo, Università di Catania (Italy)

Wednesday 26 January 2011

  • 09.00 Chapman-Enskog method and applications
    Prof. G. Kremer, Universidade Federal do Paraná (Brazil)
  • 10.45 Grad´s moment method and applications
    Prof. G. Kremer
  • 14.00 Regularization of Grad’s 13 moment equations
    Prof. M. Torrilhon, RWTH Aachen University (Germany)
  • 15.45 Application of moment method in the slip and transition regime for microfluidic device flows
    Dr. X.-J. Gu, STFC Daresbury Laboratory, United Kingdom

Thursday 27 January 2011

  • 09.00 Plume flow and plume impingement in space technology
    Dr. G. Dettleff, DLR Goettingen (Germany)
  • 10.45 Experimental facilities and modeling for rarefied aerodynamics
    Prof. E. Kustova, Saint-Petersburg State University (Russia)
  • 14.00 Review of ESA experimental research activities for electric propulsion
    Dr. J. Gonzalez del Amo, ESA ESTEC (The Netherland)
  • 15.45 Experimental diagnostics for electric propulsion thrusters
    Prof. S. Fasoulas, Institute of Space Systems Stuttgart (Germany)

Friday 28 January 2011

  • 09.00 Kinetic methods for predicting the flow physics of small thruster expansions
    Prof. D. Levin, Penn State University (USA)
  • 10.45 Simulation of electric propulsion systems
    Prof I. Boyd
  • 14.00 Discontinuous Galerkin solvers for Boltzmann-Poisson systems of equations
    Prof. I. Gamba, University of Texas at Austin (USA)
  • 15.45 Statistical simulation of reentry capsules in hypersonic near-continuum flows
    Prof. M. Ivanov, Institute of Theoretical and Applied Mechanics (Russia)

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Location : von Karman Institute for Fluid Dynamics, Rhode-St-Genèse, Belgium

From 24.01.2011 to 28.01.2011