Changes between Version 244 and Version 245 of doc/app/initialization_parameters

Timestamp:

Jul 15, 2014 1:55:15 PM (11 years ago)

Author:

knoop

Comment:

--

doc/app/initialization_parameters

@@ -1015 +1015 @@
 Random number generator to be used for creating uniformly distributed random numbers.\\\\
 It is used if random perturbations are to be imposed on the velocity field or on the surface heat flux field (see [../d3par#create_disturbances create_disturbances] and [#random_heatflux random_heatflux]). By default, the "Numerical Recipes" random number generator is used. This one provides exactly the same order of random numbers on all different machines and should be used in particular for comparison runs.\\\\
+By setting ( '''random_generator''' = '' 'random-parallel' '') a fully parallelized random number generator can be chosen. Like the default, this generator creates random numbers in a reproducible order. The parallel random number generator also provides ensemble run capability, which can be steered by specifying the parameter [#ensemble_member_nr ensemble_member_nr]\\\\
 Besides, a system-specific generator is available ( '''random_generator''' = '' 'system-specific' '') which should particularly be used for runs on vector parallel computers (NEC), because the default generator cannot be vectorized and therefore significantly drops down the code performance on these machines.\\\\
 '''Note:'''\\
@@ -1958 +1959 @@
 Time to be simulated for the [../../tec/1dmodel 1d-model] (in s).\\\\
 The default value corresponds to a simulated time of 10 days. Usually, after such a period the inertia oscillations have completely decayed and the solution of the 1d-model can be regarded as stationary (see [#damp_level_1d damp_level_1d]). This parameter is only in effect if the 1d-model is switched on for the initialization of the 3d-model with [#initializing_actions initializing_actions] = '' 'set_1d-model_profiles'.''
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#ensemble_member_nr '''ensemble_member_nr''']
+}}}
+{{{#!td style="vertical-align:top"
+I
+}}}
+{{{#!td style="vertical-align:top"
+0
+}}}
+{{{#!td
+By setting the initialization parameter [#ensemble_member_nr ensemble_member_nr] to an integer between 1 and 2000, palm will produce statistically independent members of a simulation.\\
+\\
+This parameter can only be used, if '''[#random_generator random_generator]''' = '' 'random-parallel' '' is set.
 }}}
 |----------------