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  • 1990-1994  (2)
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  • 1
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    Program Solves Euler Equations Of Supersonic Flow (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: EMTAC (Euler Marching Technique For Accurate Computation) computer program employs Euler marching algorithm for computing supersonic flows. Enables accurate nonlinear analysis of nonlinear dynamics of supersonic flow over wide range of supersonic mach numbers and angles of attack. Based on exact equations of dynamics of inviscid gas and valid for computations of flows at low and high supersonic mach numbers exhibiting strong shocks and rotational effects. Program also used for inviscid three-dimensional flows fully subsonic or transonic (subsonic with supersonic pockets). Written in FORTRAN V.
    Keywords: MECHANICS
    Type: LAR-14228 , NASA Tech Briefs (ISSN 0145-319X); 16; 1; P. 56
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    CFD spinoff - Computational electromagnetics for radar cross section (RCS) studies (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A finite-volume discretization procedure derived from proven CFD methods is used to solve the conservation form of the time-domain Maxwell's equations, in order to compute EM scattering from layered objects. This time-domain approach handles both single-frequency/continuous wave and broadband-frequency/pulse incident excitation. Arbitrarily shaped objects are modeled by means of a body-fitted coordinate transformation; complex internal/external structures with many material layers are treated through the implementation of a multizone framework capable of handling any type of zonal boundary condition. Results are presented for various two- and three-dimensional problems.
    Keywords: PHYSICS (GENERAL)
    Type: AIAA PAPER 90-3055 , AIAA Applied Aerodynamics Conference; Aug 20, 1990 - Aug 22, 1990; Portland, OR; United States
    Format: text
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    NASA TECHNICAL REPORTS
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