Validation of Three-dimensional Incompressible Spatial Direct Numerical Simulation Code
Author: Ronald D. Joslin
Publisher:
Published: 1992
Total Pages: 56
ISBN-13:
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Author: Ronald D. Joslin
Publisher:
Published: 1992
Total Pages: 56
ISBN-13:
DOWNLOAD EBOOKAuthor: National Aeronautics and Space Adm Nasa
Publisher:
Published: 2018-11-02
Total Pages: 58
ISBN-13: 9781730736032
DOWNLOAD EBOOKSpatially evolving instabilities in a boundary layer on a flat plate are computed by direct numerical simulation (DNS) of the incompressible Navier-Stokes equations. In a truncated physical domain, a nonstaggered mesh is used for the grid. A Chebyshev-collocation method is used normal to the wall; finite difference and compact difference methods are used in the streamwise direction; and a Fourier series is used in the spanwise direction. For time stepping, implicit Crank-Nicolson and explicit Runge-Kutta schemes are used to the time-splitting method. The influence-matrix technique is used to solve the pressure equation. At the outflow boundary, the buffer-domain technique is used to prevent convective wave reflection or upstream propagation of information from the boundary. Results of the DNS are compared with those from both linear stability theory (LST) and parabolized stability equation (PSE) theory. Computed disturbance amplitudes and phases are in very good agreement with those of LST (for small inflow disturbance amplitudes). A measure of the sensitivity of the inflow condition is demonstrated with both LST and PSE theory used to approximate inflows. Although the DNS numerics are very different than those of PSE theory, the results are in good agreement. A small discrepancy in the results that does occur is likely a result of the variation in PSE boundary condition treatment in the far field. Finally, a small-amplitude wave triad is forced at the inflow, and simulation results are compared with those of LST. Again, very good agreement is found between DNS and LST results for the 3-D simulations, the implication being that the disturbance amplitudes are sufficiently small that nonlinear interactions are negligible. Joslin, Ronald D. and Streett, Craig L. and Chang, Chau-Lyan Langley Research Center...
Author:
Publisher:
Published: 1993
Total Pages: 134
ISBN-13:
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Publisher:
Published: 1993
Total Pages: 122
ISBN-13:
DOWNLOAD EBOOKAuthor: Roger Peyret
Publisher: Springer Science & Business Media
Published: 2013-03-09
Total Pages: 438
ISBN-13: 1475765576
DOWNLOAD EBOOKThis well-written book explains the theory of spectral methods and their application to the computation of viscous incompressible fluid flow, in clear and elementary terms. With many examples throughout, the work will be useful to those teaching at the graduate level, as well as to researchers working in the area.
Author: Michael L. Nelson
Publisher:
Published: 1994
Total Pages: 26
ISBN-13:
DOWNLOAD EBOOKAuthor: United States. National Aeronautics and Space Administration
Publisher:
Published: 1992
Total Pages: 56
ISBN-13:
DOWNLOAD EBOOKAuthor: Chaoqun Liu
Publisher:
Published: 1993
Total Pages: 44
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1995
Total Pages: 702
ISBN-13:
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