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Mon, 01 Jan 1990 00:00:00 +0100Mon, 01 Jan 1990 00:00:00 +0100Computational Methods for the Boltzmann Equation
https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/677
This paper contains the basic ideas and practical aspects for numerical methods for solving the Boltzmann Equation. The main field of application considered is the reentry of a Space Shuttle in the transition from free molecular flow to continuum flow. The method used will be called Finite Pointset Method (FPM) approximating the solution by finite sets of particles in a rigorously defined way. Convergence results are cited while practical aspects of the algorithm are emphasized. Ideas for the transition to the Navier Stokes domain are shortly discussed.F. Gropengießer; Helmut Neunzert; Jens Struckmeierpreprinthttps://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/677Mon, 01 Jan 1990 00:00:00 +0100Several Computer Studies on Boltzmann Flows in Connection with Space Flight Problems
https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/681
This report contains the following three papers about computations of rarefied gas flows:; ; a) Rarefied gas flow around a disc with different angles of attack, published in the proceedings of the 17th RGD Symposium, Aachen, 1990.; ; b) Hypersonic flow calculations around a 3D-deltawing at low Knudsen numbers, published in the proceedings of the 17th RGD Symposium,; Aachen, 1990.; ; c) Rarefied gas flow around a 3D-deltawing, published in the proceedings of the Workshop on Hypersonic Flows for Reentry Problems,; Part 1, Antibes, France, January 22-25, 1990.; ; All computations are part of the HERMES Research and Development Program.F. Gropengießer; Helmut Neunzert; Jens Struckmeier; B. Wiesenpreprinthttps://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/681Mon, 01 Jan 1990 00:00:00 +0100Low Discrepancy Methods for the Boltzmann Equation
https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/665
As an alternative to the commonly used Monte Carlo Simulation methods for solving the Boltzmann equation we have developed a new code with certain important improvements. We present results of calculations on the reentry phase of a space shuttle. One aim was to test physical models of internal energies and of gas-surface interactions.H. Babovsky; F. Gropengießer; Helmut Neunzert; Jens Struckmeier; B. Wiesenpreprinthttps://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/665Fri, 01 Jan 1988 00:00:00 +0100