Changes between Version 54 and Version 55 of doc/app/particle_parameters

Timestamp:

Sep 13, 2010 1:30:41 PM (14 years ago)

Author:

suehring

Comment:

--

doc/app/particle_parameters

@@ -116 +116 @@
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-Ratio of the density of the fluid and the density of the particles. \\
-With the default value the particles are weightless and transported passively with the resolved scale flow. In case of '''density_ratio''' ''/= 0.0'' particles have a mass and hence inertia so that their velocity deviates more or less from the velocity of the surrounding flow. Particle velocity is calculated analytically and depends on (besides the density ratio and the current velocity difference between particles and surrounding fluid) the particle radius which is determined via [#radius radius] as well as on the molecular viscosity (assumed as 1.461E-5 m*{{{2}}}/s).
+Temporal interval at which time series data of particle quantities shall be output (in s). 
+If particle advection is switched on (see dt_prel) this parameter can be used to assign the temporal interval at which time series of particle quantities shall be output. Output is written in netCDF format on local file DATA_1D_PTS_NETCDF.
 
-If '''density_ratio''' ''= 1.0'', the particle density corresponds to the density of the surrounding fluid and the particles do not feel any buoyancy. Otherwise, particles will be accelerated upwards ('''density_ratio''' > ''1.0'') or downwards ('''density_ratio''' < ''1.0'').
+The following list gives a short description of the quantities available. Most quantities are averages over all particles. The quantity name given in the first column is identical to the respective name of the variable on the NetCDF file (see section 4.5.1 for a general description of the NetCDF files).
 
-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 '''density_ratio''' 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 density ratio for all groups will be ''0.0''.
+In case of using more than one particle group (see number_of_particle_groups), seperate time series are output for each of the groups. The long names of the variables in the NetCDF file containing the respective timeseries all end with the string' PG ##', where ## is the number of the particle group (01, 02, etc.). 
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+
 Table row with nesting:\\
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