Model.rebuild_mesh_advanced#
- Model.rebuild_mesh_advanced(collection, flow_guides=hwTripleList(), keep_selection='', mode='')#
Remesh/Improve selected shell elements with quality and flow considerations, and optional flow guide selections to guide the mesh directions. It uses the same parameter and criteria files as used by BatchMesher to specify the quality criteria and mesh parameters. The criteria and parameter files must be properly set and registered before execution. It utilizes the following fields from the parameter file:
Surface hole recognition table
Feature angle during element cleanup
Element type
Mesh type
1Ds attached to the input shell elements are used as features and they significantly impact the mesh quality and flow. If no 1Ds are present in the shells of the input elements, the specified feature angle is internally used to recognize features.
Rebuild/improve is currently supported for first-order shell elements that are not attached to solid elements.
- Parameters:
collection (Collection) – The collection containing the element entities to rebuild or improve.
flow_guides (hwTripleList) – A set of lines that are used to guide the mesh directions. Each line is composed of a list of points. User can specify as a list of lists.
keep_selection (hwString) –
Flag to keep the element selection for selective rerun. Valid values are:
always - Keep the full selection.
failed - Keep only the failed selection.
never - Do not keep the selection.
mode (hwString) –
The mode of the operation. Valid values are:
rebuild - Rebuild all selected elements.
improve - Detect and rebuild only elements that affect flow/quality the most.
Example#
Remesh the displayed shell elements with 5mm criteria and parameter file settings, with mesh flow guides, and keep the failed areas on selection#import hm import hm.entities as ent model = hm.Model() model.setqualitycriteria( string_array=[ " 0 penalty value 0.00 0.00 0.80 1.00 10.00", " 1 min length 1 1.0 3.000 2.749 1.502 1.000 0.749 1", " 2 max length 1 1.0 3.000 3.600 4.500 6.000 9.000 0", " 3 aspect ratio 1 1.0 1.000 2.000 4.400 5.000 10.000 0", " 4 warpage 1 1.0 0.000 5.000 13.000 15.000 30.000 0", " 5 max angle quad 1 1.0 90.000 110.000 134.000 140.000 160.000 0", " 6 min angle quad 1 1.0 90.000 70.000 46.000 40.000 20.000 0", " 7 max angle tria 1 1.0 60.000 80.000 112.000 120.000 150.000 0", " 8 min angle tria 1 1.0 60.000 50.000 34.000 30.000 15.000 0", " 9 skew 1 1.0 0.000 10.000 34.000 40.000 70.000 0", "10 jacobian 1 1.0 1.000 0.900 0.700 0.600 0.300 0", "11 chordal dev 0 1.0 0.000 0.300 0.800 1.000 2.000 0", "12 taper 1 1.0 0.000 0.200 0.500 0.600 0.900 0", "13 % of trias 1 1.0 0.000 6.000 10.000 15.000 20.000 0", ], mode=0, ) batch_options = [ "geometry_cleanup_flag 1", "meshing_flag 5", "element_size 5.0", "element_type 2", "mesh_align 3", "element_order 1", "surf_component 1", "feature_angle 30.0", "holes_table_begin", "appl_surf(1)" "appl_solid(0)" "appl_cordsfiles(0)" "appl_flanged_suppr(1)" "flanged_suppr_height(1.4)" "narrow_slots_type(0)" "abs_fixed_nodes_count_max(-8)" "rad(0.0,2.2) do action(1) washer(0) ", "rad(2.2,3.01) do action(0) elems(4) washer(0) ", "rad(3.01,4.7) do action(0) elems(6) washer(1) layers(3.5) ", "rad(4.7,9.0) do action(0) elems(8) washer(1) layers(0.75*radius) ", "rad(9.0,11.0) do action(0) elems(8) washer(1) layers(7.0) ", "rad(11.0,20) do action(0) elems(8) washer(1) layers(auto) ", "rad(0.0,2.2) solid(1) do action(1) ", "rad(2.2,3.01) solid(1) do action(0) elems(4) ", "rad(3.01,20) solid(1) do action(0) elems(6) ", "holes_table_end", "edge_fillet_recognition 1", "max_fillet_radius 5.0", "surface_fillet_table_begin", "surface_fillet_recognition(1)" "minimize_transitions(1)" "rad(0,2.2) wid(3.0,6.2) do split(suppress_on)" "rad(2.2,15) wid(3.4,6.2) do elems(1)" "rad(0,25.0) wid(6.2,9.2) do elems(2)" "rad(0,35.0) wid(9.2,12.5) do elems(3)" "rad(0,40.0) wid(12.5,25.0) do chordal_deviation(0.2)" "surface_fillet_table_end", "del_dupl_surfs_flag 2", "del_dupl_surfs_tol -1", "edges_stitch_flags 0", "max_edges_stitch_tol -1.0", "fix_overlapsurfs_flag 1", "overlapsurfs_maxtangangle -1.0", "narrow_surfs_merge_width -1.0", "narrow_surfs_treat_flags 3", "beads_suppression 1", "beads_recognition 1", "minimal_beads_height 1.4", "beads_treat_flags 0", "flange_recognition 1", "flange_elements_across 3", "flange_max_width 30.0", "flange_min_width 8.0", "flanges_treat_flags 1", "flange_max_remove_width -1.0", "appl_tria_reduction 1", "tria_redu_max_elemsize auto", "tria_redu_min_elemsize auto", "trias_around_holes 0", "common_mesh_flow 0", "extract_thinsolids 1", "midsurf_method 3", "thinsolid_ratio 0.3", "max_thickness 10.0", "extract_feature_angle 25.0", "pre_midsurf_cleanup 1", "direct_midmesh 0", "ignore_flat_edges 1", "flatten_connections 0", "defeat_open_width_on 1", "defeat_open_width 1.0", "supp_proxim_edges_on 1", "supp_proxim_edges 0.5", "combine_nonmanifold_on 1", "combine_nonmanifold 0.5", "midmesh_extact_elem_size 10.0", "remove_logo 1", "logo_max_size 30.0", "logo_max_height 1.4", "logo_min_concavity 1.0", "threads_removal 0", "threads_toremove_max_depth 5.0", "threads_replacediametertype -2", "folded_elems_angle 150.0", "smooth_elems_target 0.2", "fillets_mesh_flow 0", "failed_elems_cleanup_flgs 8", "move_nodes_across_feature_edges 1", "featureedge_nodes_moveacross_max 0.1", "move_nodes_across_free_edges 1", "freeedge_nodes_moveacross_max 0.05", "move_normal_flag 1", "move_normal_dist 0.8", "divide_warped_quads 1", "ignore_comps_boundary 0", "gen_topology_prepare_flags 7", "cleanup_comp_flag 0 ", "comp_select ", "use_wildcards_for_compsnames 0", "cleanup_tolerances auto", "suppress_features_rate 0", "feat_charsize_method 0", "custom_feat_suppr_maxangle 25.0", "uncond_constr_lines_suppress 0", "aggressive_fillet_lines_suppress 0", ] model.createbatchparamsfromstrings(strings=batch_options) elem_collection = hm.CollectionByDisplayed(model, ent.Element) model.rebuild_mesh_advanced( collection=elem_collection, flow_guides=[ [308.746697, 719.296657, 906.673771], [339.768568, 714.811262, 904.452529], ], keep_selection="failed", mode="rebuild", )