Changes between Version 308 and Version 309 of doc/app/initialization_parameters

Timestamp:

Mar 3, 2017 2:27:23 PM (8 years ago)

Author:

knoop

Comment:

--

doc/app/initialization_parameters

@@ -1069 +1069 @@
 {{{#!td
 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.\\\\
+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 "parallel" random number generator is used. \\\\
+By setting ( '''random_generator''' = '' 'numerical-recipes' '') PALM 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.\\\\