Flow Field Boundary Condition Assignment

  V2K provides facilities which can be employed to assign flow field boundary conditions upon model surfaces using a "point and click" procedure. Actually, these assignments may also include topological features as well. These specificatons are listed within the neutral map file.

Boundary Condition Assignment

 Flow field boundary conditions are assigned to interface objects genenrated to correspond with the boundaries of each grid block. Insofar as boundary conditions are concerned, the focus is upon block faces which are unique, and such might receive either a far-field boundary condition or perhaps a no-slip condition; these assignments require some knowledge of the flow and geometry to be analyzed and thus cannot be assigned automatically.

  In any event, the Boundary Condition facilities located in the TOG sub-panel of the Tasks panel provide the necessary controls to assign boundary conditions (and topological features) to the set of interface objects. The panel below shows the controls used to make these assignments.

The process involves the interactive selection of any number of interface objects, selecting the desired label from the pull-down menu, and then pressing the Set Type button. The rendering of the selected interface objects is then suppressed, and the assignments may then continue. Facilities located within the menu bar provide rendering controls by which interface objects having a specific type of boundary condition or topological feature may be redisplayed, thus it is always possible to review and reset assignments as required.

Type Customization

 The list of boundary conditions from which the user may select is fully customizable inorder that any flow solver nomenclature be accommodated. Boundary condition type editing facilities are available in
the right-most frame of the boundary conditions panel as shown above. To insert a new boundary condition, the user need only press the Add button at which point the Interface Type Name and Boundary ID frames will become sensitized. The user should then enter the desired name and associated identifying number in these frames, respectively. The user must then press the return key to save the new entry, and this will then appear in the pull-down menu described above.

 The contents of the boundary condition and topological feature list may also be edited. Selection of any of the listed labels will cause the Remove and Edit buttons to become sensitized. The former simply removes the entry from the list, and the latter causes the Interface Type Name and Boundary ID frames to become sensitized. At this point the user may modify the contents of either field, and pressing the return key will save the updates.