Prohlížení Ústřední knihovna ČVUT dle názvu

Zobrazují se záznamy 1245-1264 z 2019

    • NOTE ON THE PROBLEM OF MOTION OF VISCOUS FLUID AROUND A ROTATING AND TRANSLATING RIGID BODY 

      Autor: Deuring, Paul; Kračmar, Stanislav; Nečasová, Šárka
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      We consider the linearized and nonlinear systems describing the motion of incompressible flow around a rotating and translating rigid body Ɗ in the exterior domain Ω = ℝ3 \ D , where Ɗ ⊂ ℝ3 is open and bounded, with ...

    • NOTE ON VERMA BASES FOR REPRESENTATIONS OF SIMPLE LIE ALGEBRAS 

      Autor: Pošta , Severin; Havlíček , Miloslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      We discuss the construction of the Verma basis of the enveloping algebra and of finite dimensional representations of the Lie algebra An. We give an alternate proof of so-called Verma inequalities to the one given in [1] ...

    • NOx EMISSIONS FROM BUBBLING FLUIDIZED BED COMBUSTION OF LIGNITE COAL 

      Autor: Skopec , Pavel; Hrdlička , Jan; Opatřil , Jan; Štefanica , Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2015)
      This paper presents experimental results of NOx emission measurements for combustion of two kinds of coal in a bubbling fluidized bed combustor. The tested fuels were Czech brown coal (CBC) and German young brown coal ...

    • NOx PREDICTION FOR FBC BOILERS USING EMPIRICAL MODELS 

      Autor: Štefanica , Jiří; Hrdlička , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2014)
      Reliable prediction of NOx emissions can provide useful information for boiler design and fuel selection. Recently used kinetic prediction models for FBC boilers are overly complex and require large computing capacity. ...

    • Nuclear Fusion Effects Induced in Intense Laser-Generated Plasmas 

      Autor: Torrisi , Lorenzo; Cavallaro , Salvatore; Cutroneo , Mariapompea; Krasa , Josef
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2013)
      Deutered polyethylene (CD2)n thin and thick targets were irradiated in high vacuum by infrared laser pulses at 1015W/cm2 intensity. The high laser energy transferred to the polymer generates plasma, expanding in vacuum at ...

    • NUMERICAL AND MECHANICAL ANALYSES OF A 3D-PRINTED TITANIUM TRABECULAR DENTAL IMPLANT 

      Autor: Řehounek , Luboš; Jíra , Aleš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The main focus of this paper is to investigate and describe a novel biomaterial structure. The trabecular structure has only recently been recognized as a viable alternative for prostheses and implants and seems to have ...

    • NUMERICAL CALCULATION OF THE COMPLEX BERRY PHASE IN NON-HERMITIAN SYSTEMS 

      Autor: Wagner , Marcel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      We numerically investigate topological phases of periodic lattice systems in tight-binding description under the influence of dissipation. The effects of dissipation are effectively described by PT-symmetric potentials. ...

    • NUMERICAL COMPARISON OF TRANSGINGIVAL AND SUBGINGIVAL DENTAL IMPLANTS IN REGARD TO THEIR STRESS DISTRIBUTIONS 

      Autor: Řehounek, Luboš; Jíra, Aleš; Javorská, Gabriela; Bodlák, Daniel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      Most modern dental implants differentiate in regard to the fixation of the abutment into two main categories - the external or internal hexagon or octagon. We performed mechanical tests according to the ČSN EN ISO 14801 ...

    • NUMERICAL DISCRETISATION OF BUILT STRUCTURES ASSUMPTION AND REALITY 

      Autor: Gutermann, Marc; Schröder, Carsten
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The second half of the 20th century was affected by the introduction of electronic data processing. The numerical methods appeared to be capable of solving every engineering problem. However, dealing with real problems, ...

    • NUMERICAL METHOD FOR ESTIMATION OF TENSILE LOAD IN TIE-RODS 

      Autor: Riabova, Kseniia; Collini, Luca; Garziera, Rinaldo
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      The work introduces a two-phase method for determination of axial loads in tie-rods. The method described here consists of an experimental activity and an automated numerical calculation. The influence of considering an ...

    • NUMERICAL MODELLING OF COMPRESSIVE CHARACTERISTICS OF AUXETIC STRUCTURES 

      Autor: Neuhäuserová, Michaela; Koudelka, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The paper is focused on numerical analysis of mechanical behaviour of auxetic structures with re-entrant tetrakaidecahedral unit cell subjected to uni-axial quasi-static compression. The mechanical behaviour was evaluated ...

    • NUMERICAL MODELLING OF THE SOIL BEHAVIOUR BY USING NEWLY DEVELOPED ADVANCED MATERIAL MODEL 

      Autor: Veselý , Jan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      This paper describes a theoretical background, implementation and validation of the newly developed Jardine plastic hardening-softening model (JPHS model), which can be used for numerical modelling of the soils behaviour. ...

    • NUMERICAL MODELLING OF WAVE SHAPES DURING SHPB MEASUREMENT 

      Autor: Dvořák, Radim; Koudelka, Petr; Fíla, Tomáš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)
      The paper aims at the numerical simulation of the wave propagation in compressive Split Hopkinson Pressure Bar (SHPB) experiment. The paper deals with principles of SHPB measurement, optimisation of a numerical model and ...

    • NUMERICAL MULTIGROUP TRANSIENT ANALYSIS OF SLAB NUCLEAR REACTOR WITH THERMAL FEEDBACK 

      Autor: Osuský, Filip; Vrban, Branislav; Ballo, Peter; Čerba, Štefan; Lüley, Jakub; Farkas, Gabriel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2016)
      The paper describes a new numerical code for multigroup transient analyses with thermal feedback. The code is developed at Institute of Nuclear and Physical Engineering. It is necessary to carefully investigate transient ...

    • NUMERICAL PREDICTIONS AND MECHANICAL TESTING OF BRAIDED COMPOSITE STRUCTURES UTILISING DIGITAL IMAGE CORRELATION 

      Autor: Pitz, Emil; Miron, Matei-Constantin; Kállai, Imre; Major, Zoltán
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)
      The current paper is describing the implementation of a multiscale numerical model for prediction of stiffness and strength in braided composites. The model is validated by experimental testing of single-layer braided tubes ...

    • NUMERICAL SIMULATION OF A SINGLE RING INFILTRATION EXPERIMENT WITH hp-ADAPTIVE SPACE-TIME DISCONTINUOUS GALERKIN METHOD 

      Autor: Dolejší, Vít; Kuráž, Michal; Solin, Pavel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      We present a novel hp-adaptive space-time discontinuous Galerkin (hp-STDG) method for the numerical solution of the nonstationary Richards equation equipped with Dirichlet, Neumann and seepage face boundary conditions. The ...

    • NUMERICAL SIMULATION OF LID-DRIVEN CAVITY FLOW BY ISOGEOMETRIC ANALYSIS 

      Autor: Bastl, Bohumír; Brandner, Marek; Egermaier, Jiří; Horníková, Hana; Michálková, Kristýna; Turnerová, Eva
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      In this paper, we present numerical results obtained by an in-house incompressible fluid flow solver based on isogeometric analysis (IgA) for the standard benchmark problem for incompressible fluid flow simulation – ...

    • NUMERICAL SIMULATION OF SLUMP FLOW TEST OF CEMENT PASTE COMPOSITES 

      Autor: Němeček, Jiří; Němeček, Jiří
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      This study presents a numerical simulation of the mini-slump flow test performed on the Haegerman table, according to EN 1015-3. The two-dimensional axisymmetrical Volume of fluid (VOF) model is used for the calculation. ...

    • NUMERICAL SIMULATIONS OF STATIC STRENGTH OF NOVEL DENTAL IMPLANTS 

      Autor: Řehounek , Luboš; Denk , František; Jíra , Aleš
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      It is important to know the mechanical and micromechanical characteristics of conventional dental implants in order to design and develop novel dental implants and surface treatments that ensure a good biomechanical stability ...

    • NUMERICAL SOLUTION OF FLUID-STRUCTURE INTERACTION PROBLEMS WITH CONSIDERING OF CONTACTS 

      Autor: Sváček, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)
      This paper is interested in the mathematical modelling of the voice production process. The main attention is on the possible closure of the glottis, which is included in the model with the concept of a fictitious porous ...