Changes between Version 98 and Version 99 of doc/app/particle_parameters

Timestamp:

Sep 14, 2010 7:45:08 AM (14 years ago)

Author:

suehring

Comment:

--

doc/app/particle_parameters

@@ -475 +475 @@
 With several groups of particles (see [#number_of_particle_groups number_of_particle_groups]), each group can be assigned a different value. If the number of values given for '''radius''' is less than the number of groups defined by [#number_of_particle_groups number_of_particle_groups]), then the last assigned value is used for all remaining groups. This means that by default the particle radius for all groups will be ''0.0.''
 }}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#random_start_position '''random_start_position''']
+}}}
+{{{#!td style="vertical-align:top"
+L
+}}}
+{{{#!td style="vertical-align:top"
+.F.
+}}}
+{{{#!td
+Initial position of the particles is varied randomly within certain limits. \\
+By default, the initial positions of particles within the source excatly correspond with the positions given by [#psl psl], [#psr psr], [#psn psn], [#pss pss], [#psb psb], [#pst pst], [#pdx pdx], [#pdy pdy], and [#pdz pdz]. With '''random_start_position''' = ''.T.'' the initial positions of the particles are allowed to randomly vary from these positions within certain limits. \\\\
+'''Very important:'''
+In case of '''random_start_position''' = ''.T.'', the random-number generators on the individual PEs no longer  run synchronously. If random disturbances are applied to the velocity field (see [../d3par#create_disturbances create_disturbances]), then as consequence for parallel runs the realizations of the turbulent flow fields will deviate between runs which used different numbers of PEs!
+}}}