TOUCH

(required) define the wetting/activation behavior of MESHFREE points along the given boundary part

The TOUCH identifier defines when to activate boundary points on these boundary elements. It is used in AliasForGeometryItems statements such as the following.

begin_alias{} "car" = " BC$...$ ACTIVE$...$ IDENT%...% MAT$...$ TOUCH%TOUCH_liquid% MOVE$...$ LAYER0 CHAMBER1 " end_alias

Default: %TOUCH_geometrical% (if no identifier is provided) Note: A definition depending on point cloud quantities is possible with TOUCH statements.

General activation/deactivation identifiers

Wetting flags

%TOUCH_liquid% and %TOUCH_solid% will behave quite similarly. The only difference is in detachment of points from the boundary. The difference to %TOUCH_geometrical% is in the initial filling: Both for %TOUCH_liquid% and %TOUCH_solid% interior points very close to the boundary will be projected back to the boundary element in the initial filling phase. This does not occur for %TOUCH_geometrical%. Note: Activation can be further controlled with ORGANIZE_ForceTouchCheckAtWalls.

Reflective boundary identifier

TOUCH %TOUCH_reflection%

Note: The %ind_OrganizeDTB%-value for reflected points equals %ORGANIZE_WasPushedBackFromBoundary%.

Interaction with IDENT

This part of the documentation is currently under construction.

List of members:
%TOUCH_always%	boundary points always active
%TOUCH_never%	boundary points never active
%TOUCH_liquid%	boundary points activated by flow (non-geometrical criterion plus special tear-off)
%TOUCH_solid%	boundary points activated by flow (non-geometrical criterion)
%TOUCH_geometrical%	boundary points activated by flow (geometrical criterion)
%TOUCH_always_force%	boundary points always active in a forced way
%TOUCH_reflection%	points reflected at boundary