doc/salome/examples/defining_hypotheses_ex17.py

   1 # Viscous layers construction
   2
   3 import salome
   4 salome.salome_init()
   5 import GEOM
   6 from salome.geom import geomBuilder
   7 geompy = geomBuilder.New()
   8
   9 import SMESH, SALOMEDS
  10 from salome.smesh import smeshBuilder
  11 smesh =  smeshBuilder.New()
  12
  13 X = geompy.MakeVectorDXDYDZ( 1,0,0 )
  14 O = geompy.MakeVertex( 100,50,50 )
  15 plane = geompy.MakePlane( O, X, 200 ) # plane YZ
  16
  17 box = geompy.MakeBoxDXDYDZ(200,100,100)
  18
  19 shape = geompy.MakeHalfPartition( box, plane )
  20
  21 faces = geompy.SubShapeAllSorted(shape, geompy.ShapeType["FACE"])
  22 face1 = faces[1]
  23 ignoreFaces = [ faces[0], faces[-1]]
  24
  25 geompy.addToStudy( shape, "shape" )
  26 geompy.addToStudyInFather( shape, face1, "face1")
  27
  28 # 3D Viscous layers
  29
  30 mesh = smesh.Mesh(shape, "CFD")
  31
  32 mesh.Segment().NumberOfSegments( 4 )
  33
  34 mesh.Triangle()
  35 mesh.Quadrangle(face1)
  36 algo3D = mesh.Tetrahedron()
  37
  38 thickness = 20
  39 numberOfLayers = 10
  40 stretchFactor = 1.5
  41 groupName = "Boundary layers"
  42 layersHyp = algo3D.ViscousLayers(thickness,numberOfLayers,stretchFactor,
  43                                  ignoreFaces,           # optional
  44                                  groupName = groupName) # optional
  45
  46 mesh.Compute()
  47
  48 # retrieve boundary prisms created by mesh.Compute()
  49 boundaryGroup = mesh.GetGroupByName( layersHyp.GetGroupName() )[0]
  50 print( "Nb boundary prisms", boundaryGroup.Size() )
  51
  52 mesh.MakeGroup("Tetras",SMESH.VOLUME,SMESH.FT_ElemGeomType,"=",SMESH.Geom_TETRA)
  53 mesh.MakeGroup("Pyras",SMESH.VOLUME,SMESH.FT_ElemGeomType,"=",SMESH.Geom_PYRAMID)
  54 mesh.MakeGroup("Prims",SMESH.VOLUME,SMESH.FT_ElemGeomType,"=",SMESH.Geom_PENTA)
  55
  56 # 2D Viscous layers
  57
  58 # 3 edges of the 4 edges of face1
  59 edgeIds = geompy.SubShapeAllIDs( face1, geompy.ShapeType["EDGE"])[:-1]
  60
  61 mesh = smesh.Mesh(face1,"VicsousLayers2D")
  62 mesh.Segment().NumberOfSegments( 5 )
  63
  64 # viscous layers will be created on 1 edge, as we set 3 edges to ignore
  65 vlHyp = mesh.Triangle().ViscousLayers2D( 2, 3, 1.5,
  66                                          edgeIds, isEdgesToIgnore=True, # optional
  67                                          groupName=groupName)           # optional
  68 mesh.Compute()
  69
  70 # retrieve boundary elements created by mesh.Compute()
  71 quadrangles = mesh.GetGroupByName( vlHyp.GetGroupName() )[0]
  72 print( "Nb boundary quadrangles", quadrangles.Size() )
  73
  74 # viscous layers will be created on 3 edges, as we pass isEdgesToIgnore=False
  75 vlHyp.SetEdges( edgeIds, False )
  76
  77 mesh.Compute()