Changes between Version 296 and Version 297 of doc/app/runtime_parameters

Timestamp:

Apr 10, 2019 9:53:29 AM (6 years ago)

Author:

Giersch

Comment:

--

doc/app/runtime_parameters

@@ -1235 +1235 @@
 {{{#!td
 Upper limit value of the perturbation energy of the velocity field used as a criterion for imposing random perturbations (in m^2^/s^2^).\\\\
-The parameter [#create_disturbances create_disturbances] describes how to impose random perturbations to the horizontal velocity field. The perturbation energy is defined as the volume average (over the total model domain) of the squares of the deviations of the velocity components from the mean flow (horizontal average). If the perturbation energy exceeds the assigned value, random perturbations to the fields of horizontal velocities are imposed no more. The value of this parameter usually must be determined by trial and error (it depends e.g. on the total number of grid points).   
+The parameter [#create_disturbances create_disturbances] describes how to impose random perturbations to the horizontal velocity field. The perturbation energy (or resolved-scale turbulence kinetic energy) E* is defined as the volume average (over the total model domain) of the sum of the squares of the deviations of the velocity components from the mean flow (horizontal average) times 0.5. If the perturbation energy exceeds the assigned value, random perturbations to the fields of horizontal velocities are imposed no more. The value of this parameter usually must be determined by trial and error (it depends e.g. on the total number of grid points).   
 }}}
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