Changes between Version 29 and Version 30 of doc/tec/bc

Timestamp:

Jun 6, 2017 9:03:03 AM (8 years ago)

Author:

suehring

Comment:

--

doc/tec/bc

@@ -303 +303 @@
 respective wall-normal velocity components ''u'', ''v'', and ''w'' are defined (cf. Fig. 1 in Sect. [wiki:doc/tec/discret discretization]) so that the impermeability boundary condition can be implemented by setting the respective wall-normal velocity component to zero.
 
-An exception is made for the 5th-order advection scheme, where the numerical stencil at grid points adjacent to obstacles would require data within the obstacle. In order to avoid this behavior, the order of the advection scheme is successively degraded at respective grid volumes adjacent to obstacles, i.e., from the 5th-order to 3rd-order at the second grid point above/beside an obstacle and from the 3rd-order to a 2nd-order at grid points directly adjacent to an obstacle.
+An exception is made for the 5th-order advection scheme, where the numerical stencil at grid points adjacent to obstacles would require data within the obstacle. In order to avoid this behavior, the order of the advection scheme is successively degraded at respective grid volumes adjacent to obstacles, i.e., from the 5th-order to 3rd-order at the second grid point above/beside an obstacle and from 3rd-order to 1st-order at grid points directly adjacent to an obstacle.
 
 Wall surfaces in PALM can be aligned horizontally (bottom surface or rooftop, i.e., always facing upwards) or vertically (facing north,