Changes between Version 355 and Version 356 of doc/app/initialization_parameters

Timestamp:

Aug 25, 2017 1:17:39 PM (8 years ago)

Author:

sward

Comment:

--

doc/app/initialization_parameters

@@ -1327 +1327 @@
 Using non-cyclic lateral boundaries requires very sensitive adjustments of the inflow (vertical profiles) and the bottom boundary conditions, e.g. a surface heating should not be applied near the inflow boundary because this may significantly disturb the inflow. Please check the model results very carefully.
 
-Detailed information can be found in the documentation of the [../../tec/noncyclic non-cyclic lateral boundary conditions].
+Detailed information can be found in the documentation of the [../../tec/noncyclic non-cyclic lateral boundary conditions].\\\\
+'''Note 2:'''\\
+In case of cyclic boundary conditions in both horizontal directions, a y-shift at the left/right boundary can be introduced using the parameter [#y_shift y_shift].
 }}}
 |----------------
@@ -1992 +1994 @@
 With '''wall_adjustment''' = ''.T.,'' the mixing length is limited to a maximum of  1.8 * z. This condition typically affects only the first grid points above the bottom boundary.\\\\
 In case of  a non-flat topography, the respective horizontal distance from vertical walls is used.
+}}}
+|----------------
+{{{#!td style="vertical-align:top"
+[=#y_shift '''y_shift''']
+}}}
+{{{#!td style="vertical-align:top"
+I
+}}}
+{{{#!td style="vertical-align:top"
+0
+}}}
+{{{#!td
+Factor for shift of cyclic conditions at the x-boundary in y-direction.\\\\
+In case of cyclic boundary conditions, a y-shift at the boundaries in x-direction can be introduced via parameter y_shift. The shift is done by modifying the processor grid in such a way that cores located at the right x-boundary communicate across it to processors with y-coordinate shifted by y_shift relative to their own. In this way, a shift by the size of one core's subdomain size in y-direction is realized.\\
+This feature has been implemented to counter the effect of streak structures in case of cyclic boundary conditions. For a description of these, see Munters (2016; http://www.dx.doi.org/10.1063/1.4941912).\\
+This feature can only be used with a multigrid pressure solver, as the data is not truly cyclic anymore. See [../inipar#psolver psolver]. 
 }}}
 |----------------