Changes between Version 116 and Version 117 of doc/app/particle_parameters

Timestamp:

Jan 16, 2012 11:24:24 AM (13 years ago)

Author:

franke

Comment:

--

doc/app/particle_parameters

@@ -526 +526 @@
 |----------------
 {{{#!td style="vertical-align:top"
+[=#turbulence_effects_on_collision '''turbulence_effects\\_on_collision''']
+}}}
+{{{#!td style="vertical-align:top"
+L
+}}}
+{{{#!td style="vertical-align:top"
+.F.
+}}}
+{{{#!td
+Parameter to switch on turbulence effects for calculation of cloud droplet growth due to collision.\\\\
+
+For '''turbulence_effects_on_collision''' = ''.T.'' a turbulent collision kernel is used for the calculation of the cloud droplet growth due to collision. This turbulent collision kernel includes three possible turbulence effects: the modification of the relative velocity between the droplets, the effect of preferential concentration and the enhancement of the collision efficiencies. The turbulence effects are calcuclated using parameterizations of Ayala et al. (2008, New J. Phys., 10, 075015) and Wang and Grabowski (2009, Atmos. Sci. Lett., 10, 1-8). \\\\
+
+'''Note: turbulence_effects_on_collision''' = ''.T.'' requires [#wang_collision_kernel wang_collision_kernel] = ''.T.'', since the turbulence effects can only be considered during explicit calculation of the collision kernel.
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
 [=#use_particle_tails '''use_particle_tails''']
 }}}
@@ -571 +588 @@
 |----------------
 {{{#!td style="vertical-align:top"
+[=#wang_collision_kernel '''wang_collision\\_kernel''']
+}}}
+{{{#!td style="vertical-align:top"
+L
+}}}
+{{{#!td style="vertical-align:top"
+.F.
+}}}
+{{{#!td
+Parameter to steer the calculation of the cloud droplet growth due to collision.\\\\
+
+The growth of a cloud droplet due to collision is parameterized using the so-called collision kernel. By default, the collision kernel is approximated using a method from Rogers and Yau (1989, A Short Course in Cloud Physics, Pergamon Press). In this case the collision efficiencies necessary for this calculation are also taken from Rogers and Yau. With '''wang_collision_kernel''' = ''.T.'' the collision kernel is calculated explicitly and collision efficiencies from Hall (1980, J. Atmos. Sci., 2486-2507) are used. 
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
 [=#write_particle_statistics '''write_particle\\_statistics''']
 }}}