National Repository of Grey Literature 19 records found  previous11 - 19  jump to record: Search took 0.01 seconds. 
Mathematical modelling of processes in surroundings of underground radioactive waste repository
Blaheta, Radim ; Kohut, Roman ; Šňupárek, Richard
The solution of stability and safety of underground repositories of the spent nuclear fuel requires to use mathematical modelling of coupled thermal, hydrogeological and mechanical processes in rock mass. The contribution deals with methods of mathematical modelling and describes some examples of model problems, which are relevant for the assessment of geological repositories and can be used for testing of numerical methods and the corresponding software.
Large-scale computing on composite grids
Kohut, Roman
This paper concerns the numerical solution of linear elasticity BV problems on composite grids. The method was tested using both sequential and parallel codes.
Large scale FE analysis of stresses due to excavation and heating
Blaheta, Radim ; Jakl, Ondřej ; Kohut, Roman ; Starý, Jiří
Paper shows the requirements for the use of efficient iterative solvers and parallel high performance computing for solving linear systems, which arise from large scale 3-D finite element (FE) analysis of problems of elasticity and thermo-elasticity in geomechanics. We also summarize our experience and results relating to the use of problem decomposition iterative methods.
Náročné uplatnění iteračních řešičů v geotechnice
Blaheta, Radim ; Byczanski, Petr ; Jakl, Ondřej ; Kohut, Roman ; Kolcun, Alexej ; Krečmer, Karel ; Starý, Jiří
In many fields of science and engineering, we can see challenging tasks, which require application of mathematical modelling. The physical phenomena are simulated with the aid of the finite element method and this simulation leads to huge computational demands, which are concentrated mainly to the solution of large-scale systems of equations. For such systems, we need high performance iterative solvers.

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