Tag Archives: high-performance computing

Very high resolution numerical modelling for inland waterway design

R. Patzwahl, J.A. Jankowski, T. Lege

Abstract. The paper discusses the advantages and disadvantages of numerical modelling of rivers with a grid of very high resolution using the new MPI version of UnTRIM as the computational engine. The main aim of the investigation is to assess the economy of this approach taking especially into account the effort required for the mesh generation and its modification, which is usually laborious in the case of coarser meshes requiring exact reproduction of structure lines defining the flow. Continue reading →

Mathematical Model UnTRIM – MPI Version Manual

Jacek A. Jankowski

Abstract. This document is aimed to provide the user of the MPI version of UnTRIM with necessary information for the installation, compilation and especially execution of the software. Continue reading →

UnTRIM parallelization with message passing

Jacek A. Jankowski. UnTRIM parallelization with message passing, 3rd UnTRIM Workshop, Trento, 15-17 May 2006.

This is a second part of the UnTRIM parallelisation project presentations — for the background, see the previous post. The most important issue addressed so far concerns absolving a number of stringent verification tests applied for checking the parallel implementation correctness as well as the user steering of the model. Continue reading →

UnTRIM parallelization with message passing

Jacek A. Jankowski. UnTRIM parallelization with message passing, 2nd UnTRIM Workshop, Sirmione, 23-25 May 2005.

The main ideas behind the parallelisation of UnTRIM applying the domain decomposition method and the message passing (MPI) are discussed. The issues concerning the mesh partitioning, point-to-point communication over the mesh-overlapping areas (halos) for purely triangular and mixed (triangles and quadrangles) meshes and the problems connected with the Lagrangian advection scheme are thoroughly described. Continue reading →

Developments concerning parallel computing with the Telemac System

Jacek A. Jankowski. Developments concerning parallel computing with the Telemac System, 10th Telemac User Club, Chamrousse, 9-10 October 2003.

BAW is one of the a few Telemac users applying the code on high performance computers (HPC), presently all of them parallel, in their sites in Hamburg (SGI Origin 3000), Karlsruhe (SGI Origin 2000) and also by DWD in Offenbach (IBM RS/6000 SP). The presentation addresses the specific methodology, issues and developments concerning HPC: Continue reading →