ARUP; ISBN: 978-0-9562121-5-3 - CMBBE 2012 - Cardiff University

data necessary to define the overlapping areas. The aim of overlapping areas is to ensure
that the slice by slice mesh creation procedure is independent of the number of
processors used in the computation. After the mesh is created in sub-domains the mesh
for the whole domain is created by removing the overlapping areas and renumbering of
nodes and finite elements.
5. THE PERFORMANCE OF THE PARALLEL MESH GENERATION TOOL
The parallel finite element mesh generator was successfully tested up to 250 processors
and is able to create meshes of order of millions tetrahedral elements. For the tests a
data from the MIAB project [7] was used. The 166 slices of micro-CT scanned rat bone
with the picture resolution of 1284x1078 pixels were used to create the FEM grid
composed of 68 921 715 tetrahedral finite elements – Fig. 3.
Fig. 3. Cosmoprojector - parallel mesh generation procedure performance test grid
(68 921 715 tetrahedral finite elements).
Fig. 4. Cosmoprojector - parallel mesh generation procedure performance tests of
speed-up and efficiency.
The speed-up and efficiency tests results presented on Fig. 4. were performed on ACC
CYFRONET AGH (Krakow, Poland) high-performance computer Zeus – 256 nodes of
8 cores, Intel Xeon L5420 2.50 GHz, 16GB RAM, with the Scientific Linux operating
system, MPI, 4XQDR Infiniband interface.