control_mesh_refine_globally index refinement

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control_mesh_refine_globally index refinement_type

This record activates global mesh refinement or global mesh coarsening. This is not available for -tria3 and -tet4 elements. Either refinement_method is -h_refinement (more of the same elements) or refinement_method is -p_refinement (higher order elements) or refine_method is -p_coarsen (lower order elements).

As a special option for the -h_refinement method, the format refine_globally index -h_refinement switch_ $\xi$ switch_ $\eta$ switch_ $\zeta$ can be used. By example in 1D, only refine_globally index -h_refinement switch_ $\xi$ should be specified. By example in the -hex8 element, $\xi$ is the isoparametric coordinate running from the first node to the second node, $\eta$ runs from the first node the third node and $\zeta$ runs from the first node to the fifth node. A isoparametric direction will be refined if the corresponding switch is set to -yes. This option allows for refinement in specific directions. It should be used with care however, and only gives proper results if the $\xi$ , $\eta$ and $\zeta$ directions of the elements match.

The control_mesh_refine_globally will automatically merge nodes which have the same position in space.

Rules for old and new:

A new generated element inherits its data items from the old element it is generated from.
If a new generated node is placed on an old element edge it inherits those data items of the old nodes on that old edge that have a property in common; then arbitrarily the data item of one of the old nodes is taken.
If a new generated node is placed inside an old element it inherits those data items of the old nodes of that old element that have a property in common; then arbitrarily the data item of one of the old nodes is taken.
For all new nodes the node_dof records are interpolated from the old element nodes node_dof records by using the old element interpolation functions.

See also control_mesh_refine_globally_geometry.

tochnog 2001-09-02