Parallel Computing for Continuous Media Mechanics; Russian-EU Network

PC2M2-NET - ITDC-203

Keywords: HPC, parallel processing, numerical methods, MIMD, parallelisation, CFD, 3D flow, seismic data

Start Date: 1 February 95 / Duration: 30 months

[ participants / contact]

Objectivies and Approach

The main activity within the project is the development of general software for the solution of numerical problems on MIMD multiprocessors. A special technology called ASSY has been developed to provide successful parallelisation of certain numerical problems. In the framework of this project 3D convective flows in channels and closed cavities are studied, as well as the linear stability of steady and unsteady plane-parallel flows of viscous incompressible fluid. The construction of the fundamental system of solutions is reduced to the solution of a number of independent Cauchy problems which makes it possible to develop parallel codes with minimal exchange of information between processors.

Progress and Results

ASSY has been applied to the solution of several numerical problems described by a finite difference system. It has also been applied to the solution of complex problems based on the PIC (particle-in-cell) method. A universal parallelisation of PIC has been developed. The following big problems were solved with ASSY: plasma cloud expansion and the exchange of energy inside the cloud, and numerical simulation of active vibroseismic monitoring of seismic source zones.

The pulsational flow near oscillating solid bodies of different shape immersed in a liquid has been computed using parallel code based on the spectral element method. High efficiency of the parallelisation allowed to obtain detailed results for a wide range of parameters and to find critical conditions governing the transition between different regimes of mean flows. A parallel code for Parsytec PowerXplorer was also developed to study the stability of oscillatory flow of viscous non-uniform fluid.

Information Dissemination Activities and/or Exploitation

Information on activities at the Perm State University (PSU) and on the Supercomputer Software Department of SB RAS can be found at: and A description of projects related to ASSY, Parallel PIC method, and implementation and active vibroseismic monitoring of seismic source zones can be found at Each odd year SSD organises an international conference on parallel computing technologies (PaCT). Information about PaCT-97 can be found at The proceedings are published by Springer-Verlag as a volume in the "Lecture Notes in Computer Science" series. The results are incorporated into the course "Technologies for the parallel solution of large problems" given to the graduate and PhD students of State Technical University of Novosibirsk.


Perm State University, RU

EU Partners

Institut de Recherches sur les Phénomenes
Hors d'Equilibre, F
Center for Parallel Computing of
Royal Institute of Technology, S
Parsytec Computer GmbH, D

Non-EU Partners

Perm State University, RU
Institute of Continuous Media Mechanics UB RAS, RU
Supercomputer Software Dept. of Computing
Center SB RAS, RU


Dr. Vladimir Malanin
Tel: +7 3422 396 326
Fax: +7 3422 333 983

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PC2M2-NET - ITDC-203, May 1997

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html version of synopsis by Nick Cook