zone interface create command

Syntax

zone interface s create keyword

Primary keywords:

by-face    element    node

Create nodes or elements on interface s.

There are two techniques for creating an interface. The first is to derive an interface or interfaces from a range of zone faces using the by-face keyword. The second is to specify a triangular interface element from three points. Lastly, this command may also be used to construct an interface node that may, in turn, be used with the element keyword.

by-face <separate keyword> <range>

Interface elements are created on all surface zone faces that are within the specified range. An error will occur if interface elements from that interface already exist on the selected faces.

If the optional separate keyword is used, then internal zone faces are selected by the range. The list of selected faces is then automatically separated (as with zone separate) and interface elements placed on one side. The following keywords are available follwing the separate keyword:

new-side-origin v

Specifies which side of the separate faces the interfaces are placed on. It chooses the side with face normal vectors pointing toward v.

new-side-group s

Specifies which side of the separate faces the interfaces are placed on. It chooses the side with zones belonging to the specified group.

clear-attach

If specified, causes any attach conditions on the boundary to be cleared. By default an existing attach condition causes an error.

element point i keyword ...

Create a triangular interface element by specifying three points. Three vertices point 1, point 2 ,and point 3 must be specified following the element keyword. Each point can be created and located in space using the position keyword, or an existing interface node with ID i may be specified. The interface element that is created is not attached to a grid face even if the location corresponds to that of the face. The element is fixed in space. The active side of the element is defined by walking around the edge of the element, from point 1 to point 2 to point 3; the active side is up when walking in a clockwise direction.

For each point of the element, one of the following two keywords must be supplied.

node i

Identify the point with a previously created interface node with ID i.

position v

Identify the point with a new interface node created at position v.

node v

This creates an interface node at position v. If a node already exists at the selected location, an error is reported. The created node is fixed in space.