While many solvers have been ported to parallel machines, grid generators have left behind. Still the preprocessing step of mesh generation remains a sequential bottleneck in the simulation cycle. That is why the need for developing of stable 3D parallel grid generator is well-justified. Work in this direction is carried out by several institutions. <ref>[http://www.itwm.fhg.de Fraunhofer Institute for Industrial Mathematics]</ref> '''[http://www.itwm.fhg.de/en/hpc__partgen/partgen/~parTgen '''parTgen]'''<ref>parTgen - partitioner and parallel tetrahedral mesh generator] </ref> - partitioner and parallel tetrahedral mesh generator is an example of decoupled method developed and implemented by Evgeny Ivanov et al. <ref>E.G. Ivanov, H. Andrae and A.N. Kudryavtsev, Domain Decomposition Approach for Automatic Parallel Generation of Tetrahedral Grids, International Mathematical Journal Computational Methods in Applied Mathematics, Vol.6(2), 2006, pp. 178--193. </ref> <ref>H. Andrae, E. Ivanov, O. Gluchshenko, A. Kudryavtsev, Automatic Parallel Generation of Tetrahedral Grids by Using a Domain Decomposition Approach, Journal of Computational Mathematics and Mathematical Physics, Vol. 48(8), 2008, pp. 1448-1457 </ref>
<!-- Deleted image removed: [[Image:Bearcap png.png|left|250px|Decomposition of bearing cap and tetrahedral mesh generation on 32 CPUs]] -->
