Changes between Version 88 and Version 89 of doc/app/initialization_parameters

Timestamp:

Sep 15, 2010 11:20:26 AM (14 years ago)

Author:

kanani

Comment:

--

doc/app/initialization_parameters

@@ -833 +833 @@
 |----------------
 {{{#!td style="vertical-align:top"
-[=#<insert_parameter_name> '''<insert_parameter_name>''']
-}}}
-{{{#!td style="vertical-align:top"
-<insert type>
-}}}
-{{{#!td style="vertical-align:top"
-<insert value>
-}}}
-{{{#!td
-<insert explanation>
+[=#random_generator '''random_generator''']
+}}}
+{{{#!td style="vertical-align:top"
+C*20
+}}}
+{{{#!td style="vertical-align:top"
+'numerical\\recipes'
+}}}
+{{{#!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.\\\\
+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:'''\\
+Results from two otherwise identical model runs will not be comparable one-to-one if they used different random number generators.
 }}}
 |----------------