Changes between Version 256 and Version 257 of doc/app/initialization_parameters


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Timestamp:
Mar 10, 2015 6:16:10 PM (10 years ago)
Author:
suehring
Comment:

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  • doc/app/initialization_parameters

    v256 v257  
    10841084The computation of turbulent fluxes takes place inside the advection routines to get a statistical evaluation consistent to the numerical solution. \\\\
    10851085'' 'ws-scheme-mono' ''\\\\
    1086       Monotone scheme combining the 5th order upwind scheme of Wicker and Skamarock with 1st order upwind scheme using a monotonic limiter. Please note that this monotone scheme can be very diffusive. Even though the scheme prevents non-physical numerical oscillations in case of strong gradients, the numerical dispersion might be very large, particularly in areas where strong gradients occur. Moreover, it should be noted that in contrast to 'ws-scheme', the computation of turbulent fluxes '''does not''' take place inside the advection routines, resulting in possible kinks in the near-surface profiles of vertical fluxes.\\\\
     1086      Monotone scheme combining the 5th order upwind scheme of Wicker and Skamarock with 1st order upwind scheme using a monotonic limiter. Please note that due to the large numerical dissipation error this scheme is very diffusive, while the numerical dissipation can be even larger than the physical dissipation provided by the subgrid model. Moreover, even though the scheme prevents non-physical numerical oscillations in case of strong gradients, the numerical dispersion might be very large, particularly in regions where strong gradients occur. For these reasons, simulation results should be always interpreted carefully. \\\\
    10871087'' 'pw-scheme' ''\\\\
    10881088      The scheme of Piacsek and Williams (1970, J. Comp. Phys., 6, 392-405) with central differences in the form C3 is used.\\\\