Author: Ronald D. JoslinPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 56
Book Description
Validation of Three-dimensional Incompressible Spatial Direct Numerical Simulation Code
Author: Ronald D. JoslinPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 56
Book Description
Validation of Three-Dimensional Incompressible Spatial Direct Numerical Simulation Code
Author: National Aeronautics and Space Adm NasaPublisher:
ISBN: 9781730736032
Category :
Languages : en
Pages : 58
Book Description
Spatially 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...
Network and Parallel Computing
Author: Keqiu LiPublisher: Springer
ISBN: 3540747842
Category : Computers
Languages : en
Pages : 574
Book Description
This book constitutes the refereed proceedings of the IFIP International Conference on Network and Parallel Computing, NPC 2007. It covers network applications: cluster and grid computing, peer-to-peer computing; network technologies: network algorithms, network reliability and dependability; network and parallel architectures: multicore design issues, performance modeling and evaluation; and parallel and distributed software: data mining, parallel programming tools and compilers.
NASA Scientific and Technical Publications
Author: NASA Scientific and Technical Publications: A Catalog of Special Publications, Reference Publications, Conference Publications, and Technical Papers, 1991-1992
Author: NASA Technical Paper
Author: Spectral Methods for Incompressible Viscous Flow
Author: Roger PeyretPublisher: Springer Science & Business Media
ISBN: 1475765576
Category : Mathematics
Languages : en
Pages : 438
Book Description
This 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.
Electronic Document Distribution
Author: Michael L. NelsonPublisher:
ISBN:
Category : Technical writing
Languages : en
Pages : 26
Book Description
NASA Technical Paper
Author: United States. National Aeronautics and Space AdministrationPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 56
Book Description
Multigrid Direct Numerical Simulation of the Whole Process of Flow Transition in 3-D Boundary Layers
Author: Chaoqun LiuPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 44
Book Description