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  • 1985-1989  (5)
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  • 1
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    Vectorized schemes for conical potential flow using the artificial density method (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: AERODYNAMICS
    Type: AIAA Journal (ISSN 0001-1452); 24; 13-20
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Finite elements: Theory and application (1988)
    In:  Other Sources
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    Publication Date: 2016-03-09
    Description: Recent advances in FEM techniques and applications are discussed in reviews and reports presented at the ICASE/LaRC workshop held in Hampton, VA in July 1986. Topics addressed include FEM approaches for partial differential equations, mixed FEMs, singular FEMs, FEMs for hyperbolic systems, iterative methods for elliptic finite-element equations on general meshes, mathematical aspects of FEMS for incompressible viscous flows, and gradient weighted moving finite elements in two dimensions. Consideration is given to adaptive flux-corrected FEM transport techniques for CFD, mixed and singular finite elements and the field BEM, p and h-p versions of the FEM, transient analysis methods in computational dynamics, and FEMs for integrated flow/thermal/structural analysis.
    Keywords: NUMERICAL ANALYSIS
    Format: text
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  • 3
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    An efficient iteration strategy for the solution of the Euler equations (1985)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: A line Gauss-Seidel (LGS) relaxation algorithm in conjunction with a one-parameter family of upwind discretizations of the Euler equations in two-dimensions is described. The basic algorithm has the property that convergence to the steady-state is quadratic for fully supersonic flows and linear otherwise. This is in contrast to the block ADI methods (either central or upwind differenced) and the upwind biased relaxation schemes, all of which converge linearly, independent of the flow regime. Moreover, the algorithm presented here is easily enhanced to detect regions of subsonic flow embedded in supersonic flow. This allows marching by lines in the supersonic regions, converging each line quadratically, and iterating in the subsonic regions, thus yielding a very efficient iteration strategy. Numerical results are presented for two-dimensional supersonic and transonic flows containing both oblique and normal shock waves which confirm the efficiency of the iteration strategy.
    Keywords: NUMERICAL ANALYSIS
    Type: AIAA PAPER 85-1529 , Computational Fluid Dynamics Conference; Jul 15, 1985 - Jul 17, 1985; Cincinnati, OH
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  • 4
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    A strongly implicit procedure for the compressible Navier-Stokes equations (1986)
    In:  Other Sources
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    Publication Date: 2019-07-12
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: AIAA Journal (ISSN 0001-1452); 24; 6-12
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  • 5
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    International Conference on Numerical Methods in Fluid Dynamics, 11th, Williamsburg, VA, June 27-July 1, 1988, Proceedings (1989)
    In:  Other Sources
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    Publication Date: 2019-07-13
    Description: Recent advances in computational fluid dynamics (CFD) are discussed in reviews and reports. Topics addressed include CFD models in plasma dynamics, parallel computation for simulation studies, CFD for hypersonic airbreathing aircraft, multigrid methods for the steady incompressible Navier-Stokes equations, upwind differencing techniques, TV stable schemes for shock-interacting flows, Euler models of hypersonic vortex flows, parallel multilevel adaptive methods, and vortex methods for slightly viscous three-dimensional flows. Consideration is given to the accuracy of node-based solutions on irregular meshes, multigrid calculations for cascades, a finite-volume-element method for planar cavity flow, parallel heterogeneous mesh refinement for advection-diffusion equations, the convergence of the spectral-viscosity method for nonlinear conservation laws, and numerical simulations of Taylor vortices in a spherical gap.
    Keywords: FLUID MECHANICS AND HEAT TRANSFER
    Type: International Conference on Numerical Methods in Fluid Dynamics; Jun 27, 1988 - Jul 01, 1988; Williamsburg, VA; United States
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