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  • 1
    Digitale Medien
    Digitale Medien
    Attenuating Artificial Dissipation in the Computation of Navier–Stokes Turbulent Boundary Layers (1998)
    Springer
    Journal of scientific computing 13 (1998), S. 151-172 
    Details
    ISSN: 1573-7691
    Schlagwort(e): Artificial dissipation ; fourth-difference coefficient ; airfoil flows
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik
    Notizen: Abstract We propose a new formulation of the fourth-difference artificial dissipation coefficient needed for the Navier–Stokes solutions. This coefficient is scaled by a damping function which is expressed in terms of the Baldwin–Lomax algebraic turbulence model. The suggested scaling function damps the artificial dissipation across the boundary layer. The objective of this paper is to test the ability of the suggested damped scaling coefficient to provide (a) a given accuracy on a coarser grid; and (b) an accurate computing of turbulent boundary layers. To accomplish this, attached and separated transonic flows over the NACA 0012 airfoil, and turbulent flow over a flat plate have been considered.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1023270026913
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    An algebraic-Q 4 turbulence model for attached and separated airfoil flows (1996)
    Springer
    Journal of scientific computing 11 (1996), S. 71-98 
    Details
    ISSN: 1573-7691
    Schlagwort(e): Eddy viscosity ; renormalization group ; airfoil flows
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik
    Notizen: Abstract An algebraic eddy viscosity model, based on a new length scale has been developed. The model proposes the eddy viscosity as a solution of a quartic (Q 4) equation. The turbulent length scale for attached and separated flows is defined by employing a vorticity functionF =yΩD introduced in the Baldwin-Lomax model. The algebraic-Q 4 eddy viscosity model was incorporated into Navier-Stokes code and tested for complex transonic airfoil flows with separation. The results are compared with the experimental data.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02088818
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    HIGH-ORDER-ACCURATE DISCRETIZATION STENCIL FOR AN ELLIPTIC EQUATION (1996)
    Chichester : Wiley-Blackwell
    International Journal for Numerical Methods in Fluids 23 (1996), S. 367-377 
    Details
    ISSN: 0271-2091
    Schlagwort(e): discretization ; high-order accuracy ; duct flow ; Engineering ; Engineering General
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Notizen: The coefficients for a nine-point high-order-accurate discretization scheme for an elliptic equation ∇2u- γ2u=r0 (∇2 is the two-dimensional Laplacian operator) are derived. Examples with Dirichlet and Neumann boundary condtions are considered. In order to demonstrate the high-order accuracy of the method, numerical results are compared with exact solutions.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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