Simple meshing

Module: tutorials.11_academy.01_meshing.run

Section author: Gernot Plank <gernot.plank@medunigraz.at>

Overview

The objectives in this section are to learn the use of mesher for:

  • Generating of simple slab/wedge-like meshes
  • Controling the assignment of fiber and sheet arrangements
  • Defining regions by tagging elements

Details on mesher functions are given here.

Task 01: Build a simple slab mesh

  1. Use mesher to be build a discrete slab model according to the following specifications:

    length (x-direction) : 4.0 cm
width  (y-direction) : 4.0 cm
depth  (z-direction) : 0.025 cm
resolution           : 250 :math:`\mu m`isotropic

    Label the mesh using the basename thinwedge.

  1. Use meshalyzer and meshtool to verify that the mesh follows the prescribed specifiations

    • Compute the size of the bounding box using meshtool
    • Visualize the fiber orientations with meshalyzer
    ../../_images/11_ac_01_task01_verify.png

    Fig. 167 Verification of size and assigned fiber orientation. Shown is meshalyzer with loaded fiber data.

Task 02: Build a simple slab mesh immersed in a bath

  1. Use the same specs as in Task 01, but immerse the slab in a bath. Use the following bath dimensions:

    bath (x-direction) : 0.5 cm
bath (y-direction) : 0.5 cm
bath (z-direction) : 0.05 cm
resolutio          : 250 :math:`\mu m`isotropic

    Label the mesh using the basename thinwedge-bath.

  1. Use meshalyzer and meshtool to verify that the mesh follows the prescribed specifiations

    • Compute the size of the bounding box using meshtool
    • Visualize the mesh using meshalyzer, assign different colors to bath and tisue

    # .. meshtool query bbox -msh=./thinwedge

    ../../_images/11_ac_01_task02_bath.png

    Fig. 168 Verification of added bath which is only added to +x, +y, +z. Shown is meshalyzer with colored tags (Tag 0: bath in blue; Tag 1: tissue in red). Details on region tags are found in the tagging tutorial and the region section of the manual.

Task 03: Build a simple slab mesh with a central circular region

  1. Use the same specs as in Task 01, but add a circular region of radius r = 1 cm to the center of the tissue.

Task 04: Build a simple wedge mesh with rotating fibers

  1. Use the same specs as in Task 01, but increase the transmural depth z to twice the spatial resolution of the mesh such that two layers of elements are built.

    Note

    Tensors are assigned on a per element basis. Thus, to allow for transmural fiber rotation at least two element layers are nessecary.