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Size:5116.33 KB
Category:Gridgen
Add Time: 2010-7-19 11:01:37
Updated:2010-7-19 11:01:37
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About:
11.2.5 Foreground Control Functions
Foreground control functions are used to influence the distribution of grid points near the grid boundaries.
They are calculated by adjusting the control functions locally so the grid points one layer inward from the
boundaries will satisfy a specified spacing and angle constraint, with all other interior points blended
smoothly. Spacing constraint refers to the distance between a boundary grid point and the grid point one
layer inward, and angle refers to the angle that the grid line between these two points makes with the bound-
ary itself.
The current foreground control functions for each boundary of the focus grid are displayed in the table in the
center of the Blackboard. The left column lists how the spacing constraint is calculated, the center column
lists how the angle constraint is calculated, and the right column describes the type of foreground control
function. Within both the spacing and angle constraint columns, the left entry tells how the constraint is
computed and the right entry tells how the constraint is blended into the grid’s interior.
11.2.5.1 Selecting Boundaries
When you are setting foreground control function attributes with the Apply to All toggle button enabled, the
attributes are applied to all boundaries of all grids selected for the solver. However, if the Apply to Focus
toggle button is enabled, you must designate the boundaries to which you intend to set the attributes. This is
done using either of the two menus below depending on whether you are running the solver on domains and
setting attributes on edges (left) or blocks and setting attributes on faces (right).
EMAIL: cadserv21@hotmail.com
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