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Modelling 2014
Blaheta, Radim ; Starý, Jiří ; Sysalová, Dagmar
MODELLING 2014 is a conference on Mathematical Modelling and Computational Methods in Applied Sciences and Engineering, which is held in Roznov pod Radhostem, Czech Republic, in June 2 - 6, 2014. The conference is organized by the IT4Innovations Centre of Excellence, Institute of Geonics AS CR, V’B-Technical University of Ostrava and International Association for Mathematics and Computers in Simulations (IMACS). MODELLING 2014 aims to be a forum for an exchange of ideas, insights and experience in di erent areas of mathematical modelling from numerical methods and computer aspects to applications of mathematical modelling methods. This international conference belongs to a series of conferences held in Roºnov 2009, Pilsen 2005, Pilsen 2001, Prague 1998 which started 20 years ago in Prague 1994. Main topics of the conference include computational modelling in engineering and science: multiscale modelling, multiphysics modelling, progress in discretization methods, effcient solvers, nonlinear problems, reliable computations, challenging applications of mathematical modelling methods, exploiting massively parallel computing facilities.
Plný tet: UGN_0438747 -  PDF
Plný text: content.csg - PDF
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Dokončení vývoje a ověření SW Flow123D v rámci projektu DECOVALEX 2015
Hokr, M. ; Maryška, J. ; Březina, J. ; Šembera, J. ; Balvín, A. ; Bruský, I. ; Blaheta, Radim ; Hasal, M. ; Michalec, Zdeněk ; Staš, Lubomír
V rámci činností mezinárodního projektu DECOVALEX připadajících na ČR (SÚRAO) je cílem dokončit vývoj a ověřit kvalitu a vhodnost použití SW Flow123D pro výpočtové modelování sdružených termo-hydro-mechanicko-chemických (THMC) procesů na puklinovém granitovém prostředí bedřichovských tunelů.
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The history of measurement of rock mechanical properties at the Institute of Geonics AS CR
Konečný, Pavel ; Blaheta, Radim
The rock testing and evaluation of parameters for description of rock behaviour is an important part of the research at the Institute of Geonics AS CR since its foundation as an independent institute of the Czechoslovak Academy of Sciences in 1982. Focusing on mechanical testing, the first testing device, the hydraulic press EDZ 100H made in GDR with maximum force 1000 kN, was acquired in 1980, when only a branch of the Mining Institute existed in Ostrava. This equipment was substantially extended in the eighties by two „small“ mechanical presses FPZ 100 (max. force 100kN) and FPZ 10 (max. force 10kN) purchased in 1987 from GDR. But a really great progress came with the mechanical press ZWICK 1494 (500 kN) controlled by computer with a possibility of recording and processing the data. This press was bought from ZWICK Ulm (FRG) in 1985. The deformation measurement was realized by the dial test indicators. The described equipment was used for rock testing with focus on elastic behaviour and uniaxial strength limits, which were required for solving engineering problems mostly related to the coal mining.
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Geo-oriented mathematical modelling: multiphysics and multiscale
Blaheta, Radim
This contribution is aimed at a brief introduction to two important aspects of nowadays geo-oriented mathematical modelling: multiphysics and multiscale. Moreover, these types of modelling are illustrated on problems currently solved at the Institute of Geonics AS CR.The multiphysics means modelling of coupled physical phenomena. In the case of the geotechnical engineering, it is typically modelling of coupled thermo-hydro-mechanical (THM) processes, in other engineering branches, we can consider similar models, e.g. coupling of electric and mechanical phenomena. The modelling of coupled processes is particularly involved in modelling of sealing and plugging effects of bentonite barriers used in the design of underground repository of spent nuclear fuel. At present, the team at the Institute of Geonics is involved in the solution of Task A of the Decovalex 2015 project aimed at modelling in-situ SEALEX experiments, which were performed in Tournemire underground laboratory in France.
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Iterative solution of singular systems with applications
Blaheta, Radim ; Jakl, Ondřej ; Starý, Jiří ; Turan, E.
This contribution concerns the iterative solution of singular systems which arise in many applications. Let us mention the following: - solution of PDE problems with pure Neumann boundary conditions (which is our main aim), see [7], [8], [20]. Such problems have a specific role in numerical upscaling, see [6], - solution of Neumann type subproblems in domain decomposition techniques as FETI, Neumann-Neumann, BDDC methods, see [22], [16], - analysis of Markov chain problems, computation of stochastic vector, see e.g. [18], [19], - computer tomography [15], [14] and inverse problems [4], [21].
Plný tet: UGN_0426825 - PDF
Plný text: content.csg - PDF
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High performance computing in micromechanics
Blaheta, Radim ; Hrtus, Rostislav ; Jakl, Ondřej ; Starý, Jiří
By micromechanics we understand analysis of the macroscale response of materials through investigation of processes in their microstructure. Here by the macroscale, we mean the scale of applications, where we solve engineering problems involving materials like different metals and composites in aircraft design or rocks and concrete in a dam construction. Different applications are characterized by different characteristic size. At macroscale the materials mostly look as homogeneous or they are idealized as homogeneous or piecewise homogeneous. A substantial heterogeneity is hidden and appears only after more detailed zooming view into the material.
Plný tet: UGN_0426823 - PDF
Plný text: content.csg - PDF
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Výroční zpráva Ústavu geoniky AV ČR, v. v. i. za rok 2012
Blaheta, Radim
Předkládaná Výroční zpráva popisuje činnost a výsledky Ústavu geoniky AV ČR v roce 2012. V jednotlivých kapitolách informuje o výsledcích vědy a výzkumu, o spolupráci s aplikační sférou a vysokými školami, o mezinárodní spolupráci, o organizaci vědeckých k onferencí, účasti v redakčních a vědeckých radách apod. Podává také informace o organizaci, o personálním složení a činnosti orgánů ústavu, o ekonomickém fungování instituce, včetně auditu. Stručně také zmiňuje koncepci výzkumu na další období.
Plný tet: UGN_0393392 - PDF
Plný text: content.csg - PDF
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Výroční zpráva Ústavu geoniky AV ČR, v.v.i. za rok 2010
Blaheta, Radim
Předkládaná Výroční zpráva popisuje činnost a výsledky Ústavu geoniky AV ČR v roce 2010. V jednotlivých kapitolách informuje o výsledcích vědy a výzkumu, o spolupráci s vysokými školami a s aplikační sférou, o mezinárodní spolupráci, o organizaci vědeckých konferencí, účasti v redakčních a vědeckých radách apod. Podává také informace o organizaci, o jejím personálním složení, o ekonomickém fungování instituce, včetně auditu. Stručně také zmiňuje plánované činnosti na další období.
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