National Repository of Grey Literature 14 records found  1 - 10next  jump to record: Search took 0.01 seconds. 
Analysis of the turbulence parameterisations for the atmospheric surface layer
Caggio, Matteo ; Bodnár, Tomáš
The purpose of this short communication is to present a method that aims to express the turbulent variables in the atmospheric surface-layer in function of the stability of the atmosphere. The case of very stable conditions (strong strati cation), where theoretical approaches provide conflicting results (see Luhar et al. [11]), is analysed in detail to provide some insight into the limits of applicability for some of the most popular models of turbulence. The problem of the existence of the critical flux Richardson number is also taken into account.
Artificial far-field pressure boundary conditions for wall-bounded stratified flows
Bodnár, Tomáš ; Fraunié, P.
This paper presents an alternative boundary conditions setup for the numerical simulations of stably stratifed flow. The focus of the tested computational setup is on the pressure boundary conditions on the arti cial boundaries of the computational domain. The simple three dimensional test case deals with the steady flow of an incompressible, variable density fluid over a low smooth model hill. The Boussinesq approximation model is solved by an in-house developed high-resolution numerical code, based on compact finite-difference discretization in space and Strong Stability Preserving Runge-Kutta method for (pseudo-) time stepping.
When can a contract constitute the relation of influence or control and their potential consequences?
Bodnar, Tomáš ; Čech, Petr (advisor) ; Černá, Stanislava (referee)
When can a contract constitute the relation of influence or control and their potential consequences? The aim of my thesis is the description of the regulation of group entities (with the exception of concern law) with emphasis on the possibility to establish such relationship by a contract. I am trying to prove that establishment of the relationship of influence and control is possible. I am further trying to prove that such situations are not common in practice. Controlling relationship established by a contract is even quite unique. Another aim of my thesis is to describe the legal consequences of group entities under the Act on Corporations, especially the compensation for damages. However I would also like to take into consideration other consequences of group entities within the Act on corporations.
On the boundary conditions in the numerical simulation of stably stratified fluids flows
Bodnár, Tomáš ; Fraunié, P.
This paper presents the results of a numerical study of the stably stratified flow over a low smooth hill. The emphasize is on certain problems related to artificial boundary conditions used in the numerical simulations. The numerical results of three-dimensional simulations are shown for a range of Froude and Reynolds numbers in order to demonstrate the varying importance of these boundary issues in different flow regimes. The simulations were performed using the Boussinesq approximation model solved by a high-resolution numerical code. The in-house developed code is based on compact finite-difference discretization in space and Strong Stability Preserving Runge-Kutta time integration.
Note on the use of Camassa-Holm equations for simulation of incompressible fluid turbulence
Caggio, Matteo ; Bodnár, Tomáš
The aim of this short communication is to briefly introduce the Camassa-Holm equations as a working model for simulation of incompressible fluid turbulence. In particular we discuss its application for turbulent boundary layer flows. This model (and related models) is studied for several years in mathematical community, starting from Leray [23]. It can be understood as a generalization of some classical fluid models (Navier-Stokes equations, Prandtl boundary layer equations), showing some interesting mathematical properties in the analysis of the behavior of it's solution (e.g. Layton and Lewandowski [22]). It has been found however, that the model predictions can lead to surprising extensions of the use of the model in technical applications, namely in simulating the turbulent fluid flows. This brief paper should be understood as an introductory note to this novel class of models for applied scientists.
Topical Problems of Fluid Mechanics 2015
Šimurda, David ; Bodnár, Tomáš
The aim of the conference is to publish and to discuss the latest results of research in fluid mechanics.
Topical Problems of Fluid Mechanics 2014
Šimurda, David ; Bodnár, Tomáš
The aim of the conference is to publish and to discuss the latest results of research in fluid mechanics.
Conference Topical Problems of Fluid Mechanics 2013
Šimurda, David ; Bodnár, Tomáš
The aim of the conference is to publish and to discuss the latest results of research in fluid mechanics.
Numerical simulation of flow over horizontal strip moving in stratified water
Bodnár, Tomáš ; Beneš, L.
The contribution deals with the numerical simulation of the flow over thin horizontal strip placed in the stably stratified fluid flow. Mathematical model is based on the Boussinesq approximation of tne N-S equations. Two different numerical schemes were used for numerical solution. The first one is high order compact finite difference scheme, the secon one is the finite volume AUSM MUSCL scheme.
Aggregations as an antipredator strategy in common toad tadpoles (\kur{Bufo bufo}).
BODNÁR, Tomáš
Tadpoles of many anuran species use a huge number of behavioral modifications to avoid predators. Reduced activity in presence of predators is favorite strategy for common toad tadpoles (Bufo bufo). Responses against predator cues by tadpoles of Bufo bufo in the presence of another cue of larger tadpole aggregation were tested in this study. We observed that these tadpoles responded differently to predator chemical cues than tadpoles in a small group.

National Repository of Grey Literature : 14 records found   1 - 10next  jump to record:
See also: similar author names
8 BODNÁR, Tomáš
8 Bodnar, Tomáš
4 Bodnár, T.
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