Card 5d - Space Element Generation

This optional card generates a set of large inward-facing black elements forming an enclosure about the origin. If the model is not axisymmetric, these elements form a tetrahedron or a cube.

Parameters: KODE, NSP, DIV

KODE

KODE is the code SPACE(or –8) generates space elements.

NSP

NSP is an element number or a group name from a single element group. NSP must not conflict with other elements in the model and must not exceed the maximum allowable element number.

DIV

DIV is an optional integer subdivision parameter.

Code example


SPACE 2001

Notes

For axisymmetric models, a large cylinder is created about the origin. The number of elements on the circumference of the cylinder is 3*T1, where T1 is the number of tangential elements specified on the Card 9 AXISYMM Card.

If DIV is blank or zero, then four triangular space elements form a large tetrahedron about the origin. These are assigned the sequential numbers NSP, NSP + 1, NSP + 2, and NSP + 3.

If DIV is greater than 0, then six large square faces are created which form a cube about the origin. Each face is further subdivided into DIV**2 square elements, with DIV elements along each edge. The elements on the faces are assigned the group names SPACE+X, SPACE-X, SPACE+Y, SPACE-Y, SPACE+Z, SPACE-Z. In addition, all the space elements created are assigned the group name SPACE.

All points on a space element are at a distance greater than 1.E6 from the origin.

All the space elements are automatically merged into element NSP by the MEREL module.

A Card 9 SINK Card should be used to define NSP's temperature.

If Card 2a KSP = NSP, then for each element a residual view factor equal to 1 minus the sum of the view factors will be created to element NSP.