Hydro_mapBcType.F90 File Reference

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Functions/Subroutines
subroutine	Hydro_mapBcType (bcTypeToApply, bcTypeFromGrid, varIndex, gridDataStruct, axis, face, idest)

Function/Subroutine Documentation

Hydro_mapBcType()

subroutine Hydro_mapBcType	(	integer	bcTypeToApply,
		integer	bcTypeFromGrid,
		integer	varIndex,
		integer	gridDataStruct,
		integer, intent(in)	axis,
		integer, intent(in)	face,
		integer	idest
	)

This routine returns a boundary condition type (BC type) for a specific variable in a specific grid datastructure, based on the BC type that is stored in the structures of the Grid that keep track of block neighbors.

Normally, this routine just returns the bcTypeFromGrid as bcTypeToApply, or 0 (which basically has the same effect). However, this routines gives the Hydro unit the opportunity to apply different types of boundary conditions from what the Grid would normally use.

bcTypeToApply : The boundary condition type returned to the caller. The caller should use this to determine the actual handling of the boundary condition, for "this" variable (given by varIndex), data structure (given by gridDataStruct), and PARAMESH array slot (given by idest). bcTypeFromGrid : The BC type that is stored in the structures of the Grid that keep track of block neighbors - in particular, the "neigh" (Paramesh2) and "surr_blks" (Paramesh3 ff) arrays. Typically this is the BC type set with the {x,y,z}{l,u}_boundary_type runtime parameters.

varIndex : Index that selects a variable within the data structure given by the gridDataStruct argument (below). For gridDataStruct==CENTER, this is an UNK variable such as DENS_VAR. For WORK, this is meaningless and should be set to 1.

gridDataStruct : Integer value specifying the data structure. The options are defined in constants.h and they are : CENTER cell centered variables (default) FACEX face centered variable on faces along IAXIS FACEY face centered variable on faces along JAXIS FACEZ face centered variable on faces along IAXIS WORK work array specific to paramesh

face : The face on which to apply BC. Can take values LOW and HIGH, for uper and lower (left and right) side of the block, respectively. Note that LOW and HIGH are defined in constants.h to have the values 1 and 2, respectively.

axis : the dimension along which to apply BC

idest: Can usually be ignored; see Grid_bcApplyToRegion and gr_bcMapBcType if you really want to know more.

HISTORY 2013 Created - Klaus Weide

SEE ALSO Grid_bcApplyToRegion gr_bcMapBcType gr_bcApplyToOneFace

Definition at line 73 of file Hydro_mapBcType.F90.