Changes between Version 179 and Version 180 of doc/app/particle_parameters

Timestamp:

Aug 23, 2019 8:48:07 AM (5 years ago)

Author:

schwenkel

Comment:

--

doc/app/particle_parameters

@@ -457 +457 @@
 }}}
 {{{#!td
-Method for interpolating velocities to particle position. \\
-. 
-}}}
-|----------------
+Method for interpolating velocities to particle position. By default, the interpolation is done by using a trilinear interpolation. However,  the user can choose between the following methods:\\\\
+
+'' 'trilinear' ''
+      Using the trilinear method for interpolating the flow velocity to the particle position is done by considering the values of the closest surrounding grid boxes (see https://palm.muk.uni-hannover.de/trac/wiki/doc/tec/particle).
+      Therefore, particles within one grid box are sorted into eight different subgrid boxes (whether to decide which grid boxes are the closest one), to enable a faster computation of the particle velocity. This method is well tested and validated, but in some cases it shows that the well mixed condition is violated.
+
+'' 'simple_corrector' ''
+      In contrast, to the trilinear interpolation method the simple interpolation considers for every velocity only the two closest values in the corresponding direction, i.e. for the u-component the values of i and i+1 are used, for v-component the values of j and j+1, and for w-component the values of k and k-1 are considered.  Furthermore, by using this method also the predictor-corrector method is applied, i.e. the simple interpolation method is conducted with the values of t and corrected by the values of t+1. The interested reader is referred to Grabowski et al., 2018 (https://doi.org/10.5194/gmd-11-103-2018) where this method is described in more detail.
+
+'' 'simple_predictor' ''
+      The 'simple_predictor' method is the same as the 'simple_corrector' method but without the corrector step. 
+}}}
 |----------------
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