Changes between Version 189 and Version 190 of doc/app/particle_parameters

Timestamp:

Apr 5, 2022 4:58:25 PM (3 years ago)

Author:

suehring

Comment:

--

doc/app/particle_parameters

@@ -963 +963 @@
 {{{#!td
 Use subgrid-scale velocities for particle advection.\\
-These velocities are calculated from the resolved and subgrid-scale TKE using the Monte-Carlo random-walk method described by Weil et al. (2004, JAS, 61, 2877-2887). When using this method, the time step for the advancement of the particles is limited by the so-called Lagrangian time scale. This may be smaller than the current LES time step so that several particle (sub-) time steps have to be carried out within one LES time step. In order to limit the number of sub-time steps (and to limit the CPU-time), the minimum value for the particle time step is defined by the package parameter [#dt_min_part dt_min_part].
+These velocities are calculated from the resolved and subgrid-scale TKE using the Monte-Carlo random-walk method described by Weil et al. (2004, JAS, 61, 2877-2887). When using this method, the time step for the advancement of the particles is limited by the so-called Lagrangian time scale. This may be smaller than the current LES time step so that several particle (sub-) time steps have to be carried out within one LES time step. In order to limit the number of sub-time steps (and to limit the CPU-time), the minimum value for the particle time step is defined by the package parameter [#dt_min_part dt_min_part]. \\\\
+
+Please see also the discussion in ticket [https://palm.muk.uni-hannover.de/trac/ticket/1489 1489] concerning the impact of SGS speeds on particle spreading.  
 }}}
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